Is it me or is Marvel Movies starting to mess up?

I feel like they're making too many marvel movies at one time. And they're also rebooting some series or changing characters. The Amazing Spiderman etc. (I think it will be a good movie though) and the same person who played The Human Torch is playing Captain America. In the Avengers , they will be a new actor playing for Bruce Banner/Hulk. What's up with that?