First I'm going to state the likelihood of the identity of the Seventh Guardian objectively from most to least.

Kairi-the secret ending points to her

Lea- has a Keyblade and is currently active

Roxas-clues in 3D hint at him returning

Xion-could return

Namine-could return but her abilities are not combat based even though as the Nobody of Kairi, a Keyblade wielder, she should be able to use one as well just like Roxas

Vanitas-could return but would most likely join Xehanort. It would be ironic though, to have a being of pure darkness as a Guardian of Light.

 

Pesonally, I think the Guardians are Sora, Riku, Mickey, Terra, Aqua, Ventus and Roxas. They all have one thing in common. They've all been playable characters in the series

Sora-KH, CoM, KHII, 3D

Riku-CoM, KHII (temporarily during the final battle)3D

Mickey-KHII (when sora is defeated in certain boss battles)

Terra, Aqua and Ven- BbS

Roxas-KHII(prologue) Days

 

Also, all of them, save for Mickey have had starring roles in at least one game they've been playable in.

Sora-KH, CoM KHII, 3D

Riku-CoM, 3D

Terra, Aqua and Ven,- BbS

Roxas- Days

 

I know my reasoning is pretty weak and I'm not saying the some of the others won't be playable in the future, in fact I would love the chance to play as Kairi and/or Lea, but for me Roxas seems the most likely candidate for the Seventh Light. You folks?

Edited January 1, 201312 yr by Sora_Kuno

Lea...

 know why?

 

BECAUSE OF THIS!!!

Dude, that is awesome. Were'd you get such a clear pic of Lea's Keyblade? Btw until an official name is revealed Ima call it Flametongue, after the fire elemental sword in FF. And because it looks like a tongue of fire.

Edited January 1, 201312 yr by Sora_Kuno

Lea has the weirdest keyblade. I wish his keyblade his keyblade looked like the keyblade his nobody gives Sora after he dies. 

http://www.google.com/imgres?imgurl=http://images.wikia.com/kingdomhearts/images/archive/4/43/20101024091135!Bond_of_Flame_KHII.png&imgrefurl=http://kingdomhearts.wikia.com/wiki/File:Bond_of_Flame_KHII.png&h=462&w=625&sz=86&tbnid=5YM44pJxS2IFcM:&tbnh=92&tbnw=125&prev=/search%3Fq%3Dbond%2Bof%2Bflame%2Bkeyblade%26tbm%3Disch%26tbo%3Du&zoom=1&q=bond+of+flame+keyblade&usg=__rXrSfbejtUCnEGoznqkwH_ApZzI=&docid=Q_Y5YGZx_abgQM&hl=en&sa=X&ei=8u_iUJi_IfSC0QHe9YCIBQ&ved=0CDEQ9QEwAA&dur=433

 

I think the 7 lights will be Sora, Riku, Kairi, Mickey, Ventus, Aqua, and Lea. I say Lea just because I have a gut feeling there will be a Lea vs Isa showdown.

Edited January 1, 201312 yr by aaronarrgh

Aqua, Ven, Mickey, Riku, Sora, Kairi and Terra

The title of the secret ending in English, where it shows Kairi, is "another guardian of light".  

The normal ending makes you think its Lea, that's why the relatively short secret ending is meant to be shocking.

 

I thyink there;s a chance Lea may stand in for Terra til he's saved, but those listed above are the lights, mentioned by Mickey and Kairi confirmed by the secret ending.  Though I think regardless of being a light or not, Lea will step in to clash with Isa.

XION for no reason

Wait a minute...Ven Aqua and Terra are lost . They are not gonna be seen again . Maybe Ven. I would say Master Eraqus who is lying at Terra's heart and maybe Ventus ? I don't know . Ven is lying on Sora's heart so it is not possible . There is still one missing . We have Mickey,Riku,Sora,Lea,Kairi , maybe Eraqus and .......

Wait a minute...Ven Aqua and Terra are lost . They are not gonna be seen again . Maybe Ven. I would say Master Eraqus who is lying at Terra's heart and maybe Ventus ? I don't know . Ven is lying on Sora's heart so it is not possible . There is still one missing . We have Mickey,Riku,Sora,Lea,Kairi , maybe Eraqus and .......

 

This comment above me is a big wtf.

Edited January 1, 201312 yr by aaronarrgh

This comment above me is a big wtf.

Why?

Poll: http://kh13.com/forum/topic/41205-7-lights-and-13-darknesses/

 

Discussion: http://kh13.com/forum/topic/40724-spoilers-is-it-really-just-13-vs-13/