What if Dark Knight Returns Batman Replaced Adam West Batman?

Here's a great piece of Geek Art that that throws Frank Miller's The Dark Knight Returns Batman in the world of the classic 1960's TV series. As you can see, this Batman is a lot more hardcore, and isn't afraid to get blood on his hands. The piece was created by deviant art artist m7781. I love that Robin is scared shitless of what this Batman is capable of.