More primals than elements?

[jomoru]

I am counting a little more than 9

Earth: Titan
Fire: Ifrit
Wind: Garuda
Water: Leviathan
Ice: Shiva
Lightning: Ramuh
Odin
Behemoth
Elder Primal Bahamut

We know Siren will be in the game.
There's Midgardsormr

don't know if I'm forgetting any others at this moment.

Midgardsromr left a corpse.. Primals don't do that.

I don't believe Midgardsormr (or Behemoth for that matter) are primals. Rather, they are just really old beasties. Midgardsormr has been referred to as a King amongst dragon kind. I believe Bahamut is the dragon's primal.

Behemoth is the first thing we see in the "Primals unleashed" trailer.