Spoilers if you haven't played the DLC or finished the game...
Well, if you go Light Side, he could have survived, maybe, and Palps puts him in some dungeon ship somewhere. Sure, he's lying there all dead looking, but so was Vader just a few moments earlier in the game. With the Dark Side Infinities version, which they've already expanded upon with the DLC and Ultimate edition, you can continue into Return of the Jedi territory and beyond.
I'd go with bringing down Prince Xizor and Black Sun, maybe taking inspiration form that Maul comic and you have to get some Thrawn in there somewhere, too. Mara jade and all that and whatever Darth Fallen Luke is gonna be, etc.
Taking on Yoda would be crazy-cool. Burn that Dagobah swamp to the ground. Or maybe he comes out of hiding to try and train Leia and save the Rebellion. All kinds of cool shit to do.
I seriously can't wait for this to come out. It's a great game with a fun story and zero prequel connections, which is bonus for me.