How Deep Are The Marvel and DC Movie Benches?

Welcome back to the laziest comics blog on the internet, Comic Book Hoedown!

Unveiled at the San Diego Comic Con, Superman / Batman is supposed to be the next movie from DC, with the idea that they will eventually make Flash, Wonder Woman, and Justice League movies.  They've announced that Superman / Batman will be at least a little bit of a versus movie, which leaves me kind of cold. I'm sure teenaged me would slap adult me for saying that, but, hey, tastes change. However, all of the coverage and speculation about which movies are going to come from the two big comics companies got me to thinking: how many properties do they actually have that can be made into successful movies?