Also might want to add the notion of the side missions during the Vermire mission as a prelude to save Capt Kirahi in ME 1 as well as either spareing or killing the Asari in Sarien's base on Vermire. I would suggest at least 3 choices depending on the Shep that was created from the previous ME game maybe adding Garrus to the potential Love interest playing a female shep and Tali as a potential Love interest for a Male shep. I will say if they do a rebuild of the Mass Effect games and that would include the Genesis parts some Major changes would be needed to make the Genesis stories better if starting a game from a previous ME playthrough.
