Seeing Bahamut summoned like that made me sooooo happy!

Just from the little we've were shown I wonder if it's going to work a little bit like the Scholar skill that consumes their fairy to buff themselves but instead it would consume our Egi to fuel us summoning a shade of Bahamut.

And since we have a skill to summon a medium sized Bahamut (larger than our Egis but smaller than the actual Bahamut), I wonder if there's plans in the future to do that with the six elemental Primals. I'd love to be able to have a Leviathan Egi out and then supercharge him to do a few big attacks.