Sith edition speculation. possible spoilers
Okay so we see Starkiller fighting Obi-Wan on Tatooine, and Luke on Hoth. Looks like Obi-Wan will die, based on the 360 achievement. So who trains Luke as a Jedi? We know Luke takes on Starkiller at Hoth, which happened after this. So unless Luke was trained by ghost Obi-Wan, then Starkiller will be fighting a newbie with zero force training.