Indie films meanwhile are a very mixed bunch - lower budgets and production values sometimes compromise the vision but other times force the film-makers to innovate. It might be easier to stay true to your own ideas - or you might be even more dependent on your limited sources of money.
On a related subject I was thinking about the reasons people (like, say, the Asylum) might make derivative rather than original films - it's easy to be cynical about this. Here's a link to an interview with Sandy Collora who previously made a Batman fanfic short but is now working on a more original project. He talks quite frankly about getting more attention for his earlier work because it featured a known character - on the other hand by making it he developed skills and proved he could see a project through to completion, which must have helped when he was looking for support for his new feature.