In an interview with AlloCiné, Marvel Studios President Kevin Feige said Marvel currently has no plans to include the Fantastic Four in the Marvel Cinematic Universe.
"[We have] no plans with the Fantastic Four right now. No discussions about it."
This answer came after a fan asked about the possibility of a similar deal with FOX, who has the Fantastic Four film rights, that Marvel has with Sony, who has the Spider-Man film rights.
In a parallel universe, the sequel to 2015's Fantastic Four came out on June 9, 2017, its originally slated date.