Or they can follow the Blue Ending, set this far in the future and and this point Reaper-Shep has already finished helping rebuild and took the Reapers out back into Dark Space where they once again only became a myth, never to be seen again but are silently watching over the Galaxy against invading forces from OTHER Galaxies.
....or something like that. Keeps Reapers out of the story, really and lets it move on.
I hope they DO NOT go 100% based on the destruction one....the Geth had a promising future if you managed to redeem them and make them and the Quarians play nice, and I rather enjoy EDI and Jokers impossible romance (seriously....he is banging a robot...).