I mean after the Xehanort Saga is finished? I mean if they do a time skip will some of the characters be as old as they should be? On the other hand will they be just be replaced with new ones? You know what will there even be FF characters after this saga ends due to Disney characters having more importance, the last FF character was Zack in BBS, and FF characters as a whole straying away from the plot?

Time flows differently in each world

I don't have much of an opinion on the FF character per say but in KH3 I'd like for them to wrap up the stories of the ones already introduces then in the next saga give us a new set of them to focus on. Like wrap up the Cloud/Sephiroth conflict and find out what happened to Zack and after that move on from them for the most part. Maybe with them popping in and out every now and then.

They'll eat a bunch of cake then die from obesity.  Totally legit

We will see in the future.

Time flows differently in each world

This, Huey, Dewey, and Louie are proof.

 

 

I mean after the Xehanort Saga is finished? I mean if they do a time skip will some of the characters be as old as they should be? On the other hand will they be just be replaced with new ones? You know what will there even be FF characters after this saga ends due to Disney characters having more importance, the last FF character was Zack in BBS, and FF characters as a whole straying away from the plot?

 It depends on what you count as FF characters. Moogles were in DDD. If the org. moogle scene from 358/2 days makes it into 1.5 then they aren't. If it doesn't then yeah, but I mean Disney has alot to work with. If I remember correctly Buzz and Woody were supposed to be in Kh2. Since then Disney has purchased Marvel and Star wars.

I love Final Fantasy, and I love Kingdom Hearts, but I don't necessarily enjoy them mixed together.  Honestly, I wouldn't mind if most Disney and FF characters started straying from the series if they mainly focus on the original characters.

 

Having said that, however, I wouldn't mind seeing the Final Fantasy characters make a comeback.  It's really hard to say what they'll do for KH3 at this point; it could really go either way.