Iirc, its 2 new egis that have been confirmed for expansion - Leviathan and Ramuh, but this info comes from quite some time a go, so they may be adding in a third. And sadly with the lore behing phoenix in this game (FcoB), i am just going to put this out there and say, yeah, you wont be getting a phoenix egi. What would be nice would be the egi versions of the new primals, since they would be interesting.

Sadly the summon i wanted the most we wont get, poor Diablos relegated to a dungeon boss

but, more than anything else, i want an epic limit break 3 for summoner