I'm honestly a bit curious. Marvel/DC characters keep getting movies and TV shows and have consistantly since the 40's. Which makes sense because they're the top sellers and it's in the company's interest too keep the characters as high as possible for as long as possible. Though as far as I can tell, this isn't really as common outside of Marvel and DC. The obvious exception to us is TMNT, six theatrical movies and five TV shows. But what others are there?
Some basic rules so people don't just pick any comic that happens to have a movie adaptation:
- At least three movies or TV shows
- At least one of each
- Definitely not owned by Marvel or DC
- Preferably not published by them even if the creators keep the copyright, it is still in their interest to promote comics they make some profit from
- Corporate ownership is allowed as long as it isn't Marvel/DC or their parent companies Disney/Warner
- It has to have started out as comic, a comic intended to market a toyline or a franchise that just happens to have more comics than anything else is not allowed. A toyline drives too many of the creative decisions and almost any successful franchise has more comics than anything else because they're dirtcheap to produce.
- It has to be American, maybe Canadian can fly because nobody cares about the difference but in general American. If we counted things like Dragon Ball and Tintin it would be way too easy.