RE: Jimbo not doing his homework.

You poor fool. Batman has already faced an entire island comprised of dinosaurs.

It's funny because I caught this rerun a few weeks ago. I believe it actually started out as robotic dinosaurs in the original comics, but it has since changed into actual dinosaurs. Batman had his hands full, but he beat those filthy beasts with the help of his superior intellect and billion dollar gadgets. Everyone always forgets the gadgets. It's an ever-changing array in his utility belt. Usually based on the character he is fighting. When he goes to Metropolis, he brings kryptonite because he's afraid Superman may go off his rocker and try to destroy the planet. He has anti-venom when he fight Poison Ivy, Subzero batsuit when he fights Mr. Freeze, and the list goes on. It's his preparation that allows him to best most of his foes. Know thy enemy...

I mean, I guess it's possible Batman wouldn't be prepared to face them if he had a stroke or something before heading out to fight the dinosaurs...Odds are he'd forget some gadgets if that happened. 

Bottom line: That artist's painting is completely inaccurate. Batman isn't foolish enough to get into a fist fight with a dinosaur. He's the World's Greatest Detective, not the World's Greatest Detective Eaten by Dinosaurs.