I mean that there wasn't a ton of time that elapsed between the last Spider-Man film with Tobey Maguire and the new one. Ditto for Superman's new casting with Henry Cavill and the former actor Brandon Routh. The last FF film was out just a few years ago and they are already developing a new one. People keep saying that 10, 15 years have to pass before a new franchise can be reborn. Clearly the studios aren't waiting that long and guess what--audiences are going right along with it just fine.