So far, BioWare has sort of (wisely) followed in the footsteps of Peter Jackson's Lord of the Rings Trilogy.Mass Effect begins with a prologue, Mass Effect 2, throws you right into a life and death conflict, Mass Effect 3...
Should have two separate openings.One for those who have save imports going back to the 1st game and a another opening, for those who have none.This may sound strange at first, but i think ME3, should start out like The Academy Award Winning Animated Film, The Incredibles...With Shepard Commander (and perhaps even members of your squad) being interviewed by Emily Wong (Save Import Only Version).
This interview has been put on the back burner, ever since the 1st game.Having a chance to rebut what those in the Council and Alliance said of you and your concerns post Battle of the Citadel.Telling your side of the story, in game, would be brilliant! The 'calm before the storm' as it were...
On another note: Concerning your squadmates, Post Suicide Mission : Zaeed is training Cerberus soldiers, Grunt is acclimating himself into Clan Urdnot, Samara, returns to her life as a Justicar, Thane is spending what time he has with his son, Garrus, is Liara'T`Soni's 'right hand man', as for the others...They may still be with you, but most (if not all of your 'Dirty Dozen') are still on call.If you need their aid once more; more than not, they won't be hard to reach...