User blog comment:TheVision185/Avengers Movie: When?/@comment-5699975-20121105010010/@comment-1895174-20121105221251

Yes, I'm certain. I even wrote a blog about it when it was happening. Marvel apparently proposed a deal to FOX - more time to work on the Daredevil reboot in exchange for some of the Fantastic Four characters, namely Galactus and Silver Surfer. However, FOX's Daredevil project was falling apart, having just lost its director, while their Fantastic Four project was just getting off the ground. In other words, they didn't take the deal, and the rights to Daredevil reverted back to Marvel/Disney on October 10th.

Although it might be stupid of FOX to give up on their ambitions for the Fantastic Four, it's still a possibility. However, it will take a long time for Marvel to get the rights to those characters back, and the MCU will most likely be wrapped up by then.