I'm curious as to what the Reapers will do in ME3. So far we've stopped them twice; in ME1 Shepard stopped them from doing their reboot of the galaxy and in ME2 we stopped them from kidnapping and making a new Reaper. Based on how ME2 ends it looks like they're gonna try and just go for a board-wipe of the galaxy.
As for me, I went Paragon, saved everyone, blew that thing up. Blew it up for 2 reasons: don't trust Illusive Man, remembered Mordin's conversation on how the Salarians screwed over the Krogan and only new is a saved Wrex attempting to save the Krogan.
What do you think the story for ME3 will be?
What I'm hoping for is that it'll revolve around a bunch of Reaper ships going to try and destroy the Citadel. Shepard stops them only to see it was a ploy and their main target is Earth, seeing that humanity as a whole is why their plans are failing. Rest of Earth fleet attempts to stop them as Shepard tries to return to Earth to join in the fight. The Reapers shut down all the mass effect relays and he's stuck at the Citadel. Legion shows up with Geth datasphere and upgrades Normandy to travel at mass effect relay speeds w/o using one.
Shepard shows up at Earth, kicks ass but is losing the battle. Turian fleet, Asari fleet, Salarian ships, Krogan warriors, Migrant Fleet, Geth datasphere show up as the calvary to save humanity. Shepard teams up with everyone from ME1-3 to go and attack the Reaper fleet ship. Badass fight occurs, succeed at saving the galaxy, Shepard & crew fly off to go kick more ass in the next galaxy that the Reapers are housed at.