Summons... what's next?

Summons, Phantom Beasts, Espers, Guardian Forces, Eidolons, Avatars, all basically are magical creatures that are invoked by spellcasters to aid them with their powers. Some enhance the owner's abilities other launch impressive magical attacks when called to the battefield.
They first appeared in the FFIII (Japan), and have continued appearing until the lastest games. There are more than 50 different summons, and some reappear constantly in many of the FF games.
Here, we know them as Primals, and they are the gods of the beast tribes. Currently we have witnessed the power of Ifrit, Titan, Garuda, Leviathan, Good King Moogle Mog XII, Ramuh and Shiva. We also know Odin and Bahamut that are also primals. There are 3 more Primals: Belias, Bismarck and Ravana that haven't appeared yet.
So... after meeting Shiva in the lastest patch 2.4, what is next?

Reviewing all the summons in the first games (From FFIII to FFXI), i've counted 67 summons. Here is the list and the game where they appear:

- Alexander (FF6, FF7, FF8, FF9, FF11)
- Anima (FF10)
- Ark (FF9)
- Asura (FF4)
- Atomos (FF9)
- Bahamut (FF3, FF4, FF5, FF6, FF7, FF8, FF9, FF10, FF11)
- Bismarck (FF6)
- Bomb (FF4)
- Brothers (FF8)
- Cactuar (FF8)
- Cait Sith (Stray) (FF6)
- Carbuncle (FF5, FF6, FF8, FF9, FF11)
- Catoblepas (Shoat) (FF5, FF6)
- Cerberus (FF8)
- Chocobo (FF3, FF4, FF5, FF7, FF8)
- Cockatrice (FF4)
- Crusader (FF6)
- Diablos (FF8, FF11)
- Doomtrain (FF8)
- Eden (FF8)
- Fenrir (FF6, FF9, FF11)
- Garuda (FF11)
- Gilgamesh (FF8)
- Goblin (FF4)
- Golem (FF5, FF6)
- Griever (FF8)
- Hades (FF7)
- Ifrit (FF3, FF4, FF5, FF6, FF7, FF8, FF9, FF10, FF11)
- Ixion (FF10)
- Kirin (FF6)
- Kjata (FF7)
- Knights of the Round (FF7)
- Lakshmi (Starlet) (FF6)
- Leviathan (FF3, FF4, FF5, FF7, FF8, FF9, FF11)
- Madeen (FF9)
- Maduin (FF6)
- Midgardsormr (Terrato) (FF6)
- Mindflayer (FF4)
- Mini Mog (FF8)
- Mist Dragon (FF4)
- Moomba (FF8)
- Odin (FF3, FF4, FF5, FF6, FF7, FF8, FF9, FF11)
- Pandemona (FF8)
- Phantom (FF6)
- Phoenix (FF5, FF6, FF7, FF8, FF9, FF11)
- Quetzalli (Palidor) (FF6)
- Quezacotl (FF8)
- Ragnarok (FF6)
- Raiden (FF6)
- Ramuh (FF3, FF4, FF5, FF6, FF7, FF9, FF11)
- Remora (FF5)
- Seraph (Sraphim) (FF6)
- Shiva (FF3, FF4, FF5, FF6, FF7, FF8, FF9, FF10, FF11)
- Siren (FF6, FF8)
- Syldra (FF5)
- Sylph (FF4, FF5)
- The Magus Sisters (FF10)
- Tiamat (FF8)
- Titan (FF3, FF4, FF5, FF7, FF9, FF11)
- Tonberry (FF8)
- Typhoon (FF7)
- Unicorn (FF6)
- Valefor (FF10)
- Valigarmanda (Tritoch) (FF6)
- Whyt (FF4)
- Yojimbo (FF10)
- Zona Seeker (ZoneSeek) (FF6)

So, if we sort them by the number of games in which they appeared, we get this:

9 GAMES
Bahamut (FF3, FF4, FF5, FF6, FF7, FF8, FF9, FF10, FF11)
Ifrit (FF3, FF4, FF5, FF6, FF7, FF8, FF9, FF10, FF11)
Shiva (FF3, FF4, FF5, FF6, FF7, FF8, FF9, FF10, FF11)

8 GAMES
Odin (FF3, FF4, FF5, FF6, FF7, FF8, FF9, FF11)

7 GAMES
Leviathan (FF3, FF4, FF5, FF7, FF8, FF9, FF11)
Ramuh (FF3, FF4, FF5, FF6, FF7, FF9, FF11)

6 GAMES
Phoenix (FF5, FF6, FF7, FF8, FF9, FF11)
Titan (FF3, FF4, FF5, FF7, FF9, FF11)

5 GAMES
Alexander (FF6, FF7, FF8, FF9, FF11)
Carbuncle (FF5, FF6, FF8, FF9, FF11)
Chocobo (FF3, FF4, FF5, FF7, FF8)

3 GAMES
Fenrir (FF6, FF9, FF11)

2 GAMES
Catoblepas (Shoat) (FF5, FF6)
Diablos (FF8, FF11)
Golem (FF5, FF6)
Siren (FF6, FF8)
Sylph (FF4, FF5)

1 GAME
The rest

So, who is next?

Besides we already know who are the remaining primals, i'm expecting to see Phoenix or Alexander in some of the following updates. Also I would love to see Queen Asura from FFIV.

What do you think? Who would you like to see?

Jayle

Alexander seems more likely to come out in the expansion HEAVENsward. (see what I did there? Heaven? Holy?). I think we can also eliminate any primals on that list that share the same name as a monster in game (Cactuar, Bomb. Siren, Carbuncle etc) but you never know. Phoenix is most likely next, though I would like to see Ragnarok and Knights of the Round make an appearance.