The Professor Nichols cameo was pretty cool. Only knew about him thanks to this place XD
I still have no clue why the Kamandi future still exists if Batman went back in time with the serum, but whatever, that was awesome.
I liked that Batman signed the kids' autographs, it seems like the usual dark-n-edgy Batman would have just, well, Batmanned away while Scott Free's back was turned instead of sticking around. Or agreeing to escape from a deathtrap for charity at all, really.
Were the bat-creatures from the comics too? They were my favorite ones (although the sheer goofiness of the snakes was great too).
Oh, and you posted that "The Hospital!" scan twice :o