Oh, alright. I like the idea of the Ender Dragon being the main antagonist. (Either still showing up at the end, literally, or having more involvement with the Ender stuff.) Or involving more, maybe Dungeons stuff (they're making a new one).
I mean, he'd look weird without Steve being there. Also, in his original story, all he did was just randomly appear every now and then. I don't think he even got hostile, let alone had powers.