I'm probably going to get reactions of, "WUT NU HE AINT GOT NU NOBODY HES GOT XEMNAS U STOOPID", but let's think about this long and carefully. Hope you're good at math.
Heartless = beings of darkness; heart consumed by darkness
Nobody = non-existancing beings; body and soul.
Master Xehanort - Heart = Master Xehanort + Body and Soul
MX's Heart + Terra = Terra-Xehanort (Terranort)
As you can see from these equations, the body and soul are the product when MX released his heart. And they disappear...kind of like Eraqus'...but we'll get into that later.
Now let's go to Apprentice Xehanort's case:
Terra + MX's Heart + Eraqus' Heart + No Memories = Apprentice Xehanort
AX + Expose of Darkness - (Terra's Heart + MX's Heart + Eraqus' Heart) = AX + Terra's Body and Soul
Terra's Body and Soul + Influence from the three hearts = Xemnas
So this right here you can see that Terra's, MX's, and Eraqus' Heart were used to create the Apprentice Xehanort you know. It was then the three used to create Ansem and Xemnas.
But what I'm really trying to get here is that yes the Heartless used the three hearts and darkness to make Ansem, but the three hearts and ONLY Terra's Body and Soul was used to create Xemnas. MX's or Eraqus' was not used. This leads me to my next point.
No Heart is MX's Nobody. The sames goes with Armor of the Master is Eraqus' Nobody.
Here's the thing. There needs to be a Heartless in order for there to be a Nobody right? And the only way for MX's and Eraqus's Nobody to be born is by having AX lose those hearts, technically? Well does timing matter? Can a Nobody be born even when a year past and the body and soul have yet to do anything? I think so. Since when did timing matter anyway. As long as the Heartless is eventually created, then so will the Nobody. They'll be sharing Ansem as the Heartless.
It makes sense. If you think about Ansem and Xemnas being destroyed and MX coming back, it'll be obivious that he's coming back with Terra. And we all know that Sora's got to beat Xehanort without him fused, to "heal" Terra. So I theorize that MX and Terra will split. Only problem is that he would need his body and soul to be his original self. That's where No Heart comes in. If he gets defeated, then MX can turn back to himself to continue his conquest for one last time. If Armor of the Master Gets defeated, then Eraqus can have his heart back and with the body and soul, you'll have a Keyblade Master helping out against MX. Simple, right?
Nomura gave them the armor to trick you guys. He wanted to use that to hide their true identity. Some of you guys are thinking that the two are Sentiments and you're not getting it. If I put your logic together, then when Terranort comes back, he's going to function without a mind? I don't think so. He should technically be in a comatose state, since there is no mind. Then what, No Heart saves the day, being like, "HAI ME, I'M JUST GOING TO BECOME PART OF YOU, DON'T MIND ME!" (No pun intended). And Armor of the Master? Pfft, same thing. Besides, Sentiments are not showing up to be a problem, probably because Lingering Sentiment is the only one so far.
I'm not excatly sure how it works if Terranort co-exists with No Heart and Armor of the Master are existing, but overall it makes perfect sense. Now we just go to wait and see if this is right, or if Nomura throws a low curve ball and we find out that neither of them are Nobodies.
TL;DR: MX's and Eraqus' hearts were released into Terra, leaving behind the body and soul. When the three hearts were released from AX, they created the Heartless from the consumption of darkness, Ansem, while Terra's body and soul with MX and Eraqus influences created Xemnas. The other bodies and souls of MX and Eraqus are used to create seperate Nobodies of their own, No Heart and Armor of the Master.
I'm probably going to get reactions of, "WUT NU HE AINT GOT NU NOBODY HES GOT XEMNAS U STOOPID", but let's think about this long and carefully. Hope you're good at math.
Heartless = beings of darkness; heart consumed by darkness
Nobody = non-existancing beings; body and soul.
Master Xehanort - Heart =
Master Xehanort+ Body and SoulMX's Heart + Terra = Terra-Xehanort (Terranort)
As you can see from these equations, the body and soul are the product when MX released his heart. And they disappear...kind of like Eraqus'...but we'll get into that later.
Now let's go to Apprentice Xehanort's case:
Terra + MX's Heart + Eraqus' Heart + No Memories = Apprentice Xehanort
AX + Expose of Darkness - (Terra's Heart + MX's Heart + Eraqus' Heart) =
AX+ Terra's Body and SoulTerra's Heart + MX's Heart + Eraqus' Heart + Consumption of Darkness = Ansem
Terra's Body and Soul + Influence from the three hearts = Xemnas
So this right here you can see that Terra's, MX's, and Eraqus' Heart were used to create the Apprentice Xehanort you know. It was then the three used to create Ansem and Xemnas.
But what I'm really trying to get here is that yes the Heartless used the three hearts and darkness to make Ansem, but the three hearts and ONLY Terra's Body and Soul was used to create Xemnas. MX's or Eraqus' was not used. This leads me to my next point.
No Heart is MX's Nobody. The sames goes with Armor of the Master is Eraqus' Nobody.
Here's the thing. There needs to be a Heartless in order for there to be a Nobody right? And the only way for MX's and Eraqus's Nobody to be born is by having AX lose those hearts, technically? Well does timing matter? Can a Nobody be born even when a year past and the body and soul have yet to do anything? I think so. Since when did timing matter anyway. As long as the Heartless is eventually created, then so will the Nobody. They'll be sharing Ansem as the Heartless.
It makes sense. If you think about Ansem and Xemnas being destroyed and MX coming back, it'll be obivious that he's coming back with Terra. And we all know that Sora's got to beat Xehanort without him fused, to "heal" Terra. So I theorize that MX and Terra will split. Only problem is that he would need his body and soul to be his original self. That's where No Heart comes in. If he gets defeated, then MX can turn back to himself to continue his conquest for one last time. If Armor of the Master Gets defeated, then Eraqus can have his heart back and with the body and soul, you'll have a Keyblade Master helping out against MX. Simple, right?
Nomura gave them the armor to trick you guys. He wanted to use that to hide their true identity. Some of you guys are thinking that the two are Sentiments and you're not getting it. If I put your logic together, then when Terranort comes back, he's going to function without a mind? I don't think so. He should technically be in a comatose state, since there is no mind. Then what, No Heart saves the day, being like, "HAI ME, I'M JUST GOING TO BECOME PART OF YOU, DON'T MIND ME!" (No pun intended). And Armor of the Master? Pfft, same thing. Besides, Sentiments are not showing up to be a problem, probably because Lingering Sentiment is the only one so far.
I'm not excatly sure how it works if Terranort co-exists with No Heart and Armor of the Master are existing, but overall it makes perfect sense. Now we just go to wait and see if this is right, or if Nomura throws a low curve ball and we find out that neither of them are Nobodies.
TL;DR: MX's and Eraqus' hearts were released into Terra, leaving behind the body and soul. When the three hearts were released from AX, they created the Heartless from the consumption of darkness, Ansem, while Terra's body and soul with MX and Eraqus influences created Xemnas. The other bodies and souls of MX and Eraqus are used to create seperate Nobodies of their own, No Heart and Armor of the Master.