Yes, they have to film a movie within I think 10 years. I think they have to start some kind of pre production within 5 years also. I wouldn't be surprised if they give up the rights after deciding it's not a profitable franchise. They lost a lot of money on the last two movies. Nobody knows what is actually in the licensing contract but I wonder if they can make a shitty movie with the idea of never releasing it just to keep the license like Corman did, or do they actually have to release the movie? The reason I think it is ten years is because I based it on when Daredevil went back to Marvel 2002 - 2012. Also the timeline of FF movies 1994 Roger Corman - 2005 Fox - 2015 Fox. The Corman version was made just to keep the license, which Stan Lee admitted. They lost the license to Fox, who made a movie 11 years later, or one year after they got the license, Fox made the latest one in 2015, which is 8 years after Rise of the Silver Surfer. They now have at least 5 years to decide what to do so don't expect to hear anything for at least that long unless they volunteer(or make a deal) to give it up to Marvel.