I don't honestly believe that Hasbro is going to have the guts to kill Optimus off again - I'd be pleasantly amazed if they did, though - especially with this show's "dead is dead" edict (Cliffjumper and Skyquake still count IMO).
I'm guessing since he's at the scene that
, thus leading to Optimus' BH form (though personally I'd have preferred a Synth-En transfusion with all the dangerous imbalances it brings)
"My folks came to the U.S. as immigrants, aliens, and became citizens. I was born in Boston, a citizen, went to Hollywood and became an alien."