[Ten Thousand Bears]

With respect, I don't think that the trailer depicts Dickhead Superman at all. It seems to me that Superman is drained from constant battles with Luthor but has become aware of Braniacs approach and the threat is represents. So, while the rest of the League holds off Luthor and the gang Superman tries deperately to recharge his powers via the Suns radiation (hence his ragged state). He seems aware of what's going on on Earth, but also knows Braniac is the bigger threat. Finally though, when he hears Diana's death scream he simply snaps and returns to confront Luthor. Hence the exile in space (why should Luthor know what he was up to) and the "you've lost everything" speech.

Ten Thousand Bears.