Originally Posted by Shem
Now that could be a logical explanation to why Starkiller doesn't play a role in the OT. He ran off with Juno.
That is logical.
Another reason could've been that after he (somehow) escapes from the Deathstar, Starkiller searches for Juno. Eventually crashing on the unknown world (seen in the trailer), leaving him out of the OT.
Unfortunately LA has announced that the game is between episodes 3 & 4, ruling out the reason stated above (the one I posted).