Carl on 17 August 2010
I personally think that at the start of the game, when you're on the operating table...
You will have a flashback. That flashback will last a fair few hours, will let you create your Shepard and play through all the main story elements of the Original. It can easily be completed within a few hours.
When the Flashback is over, with you defeating Saren/Sovereign... You choose whoever you want to be in control and the flashback ends, with you finally waking up.
The main storyline choices will be there for your save file to import over to the eventual Mass Effect 3 when it releases.
