yeah i have no problem with shepard dying off. you save the galaxy 3 times, eventually it just feels silly. gotta catch up to him sometime.

as to who the next protag will be, only guess i'd have would be the kid from the closing cutscene. or just someone entirely new. it would make sense because since that's in the future, another intergalactic transit system might be up and running. i haven't checked out the new ending from the dlc but based off the original ending, it'd be pretty hard to make another mass effect without the relays.

or, interesting concept, one of shepard's descendents. could be half asari or something if you're importing o.O