I don't know if this thread will be usefull or not, but I noticed something I don't know if anyone else did. Look at this screenshot: We know it's Lockdown jumping in the Damen Silo in Chicago. Now if you look at this pic of Optimus and Lockdown's battle you'll se that the columns Optimus is thrown is the same one's of the silo: This could mean Lockdown jumped from his Nightship to fight Optimus or, as the next shot suggests, to take Marky Mark's wierd sword-gun, 'cause the same columns are in the background (and a Kicked-in-the-face Prime): To me this could mean: 1) It's the final battle when Lockdown is killed by Optimus/Grimlock/Cade; 2) It's not the final battle, but it's when Lockdown dies. The final battle might be later against Galvatron (I don't think so); 3) It's not the final battle neither Lockdown's death. They may fight again later and Lockdown might not even die in this movie. So, that's it.