I have got an interesting idea. I never wanted to leave the ME trilogy after ME3, bacause it's so great. Nevertheless the universes of ME and ME2 are limited and get boring through time. That's why I wanted Bioware to create something in ME3 that would make me play the whole trilogy again or at least to come back to it for a little while.
I think that is not only my dream.
So I thought that Bioware could give us something like a time machine, which would enable you to go back in time to the chosen point of your playthrough and make something different, use the knowledge or items form the future.
What do you think??