Elektra doesn't qualify as part of a Daredevil franchise, IMHO.
The Flash could get by with one film, but I think as a character, he'd lose audience appeal beyond that.
I just meant Fantastic Four has yet to have a successful sequel, so as of now, it has not proved itself as a franchise.
Yeah. I don't see a bright future for films like IRON MAN or those sorts, just because the whole superhero thing is getting to feel real passe. If DC was the only one making superhero films, it would hardly be flooding the market. But Marvel has superhero films coming out as well.
Perhaps never. It's possible that DC already missed the window to get such films out there in the market. But I don't think most of these characters can really support viable franchises. Most of them could probably do successful single installments, but multiple films? I'm doubtful.