I think one of the biggest problems with the DC vs. Marvel movie mega-franchises is that, outside of the comic book fan world, the Marvel characters hadn't been as exploited in film or TV shows. They existed on a lower plane of familiarity.
Marvel was able to take their stable of recognizable characters that a lot of movie goers didn't know every single detail about and turn each one into sub-franchises that led to the Avengers multi-franchise series. (God, it sounds just as robotic as it actually was/is.)
DC has Superman, Batman, and Wonder Woman, with each one already receiving multiple exposures as films and reboots of films, or TV shows and reboots of TV shows.
Can audiences really watch yet another film that tells them the exact same way Batman became Batman or Wonder Woman became Wonder Woman? This last Superman movie made decent bucks at the box office, but most people thought it sucked. Not exactly the best way to kick off a multi-picture franchise within a mega-franchise.
I think they've sold us the same food one too many times. If I were them I would focus on the characters that haven't been overcooked, like Aqua Man. If they can get that off the ground, they stand a better chance of pulling audiences into the whole thing.
But focusing on the "old warhorses" like Batman and Superman, over and over again, is not a great idea, IMO.
"Jaws is the Citizen Kane of movies."
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