1.) Alexander (But, like his FFIX appearance with those big wings, that was my favorite version of him)

2.) Bahamut

3.) Shiva

4.) Phoenix

5.) Ramuh (Or Ixion either would satisfy me)

6.) Anima (Another one of my favorite summons <3)

7.) Magus Sisters

8.) Leviathan (Not sure if he is really confirmed since they haven't said if that huge serpent is actually him)

9.) Whyt (I've always liked the idea of a little Eidolon who you could teach abilities)

10.) Diabolos

11.) Fenrir

12.) Valefor (She is my third favorite summon)

I would have said Odin but, I think he is confirmed. . .