Well we know his return will come eventually due to certain events....
*cough* Coil turn 5 events *cough*
So are you excited or not?
What kind of things do you expect to see with his return?
For me he I'm looking forward to see in person the antagonist everyone seem to love in 1.0
he will probably have a different versions for his battle with his return.
one will be for Coil where is he is at his strongest due to his "return" into the world of Eorzea.
second battle is probably a story battle version for Main Story Scenario where he has different mechanics from coil.