Yes, that has been the case for a while. There was a rumor last year that Marvel was trying to get back some FF supporting characters like Galactus and Silver Surfer.
I think Namor was with that first group of rights Avi Arad started shopping around in the late 1990's/ early 2000's along with the FF,X-Men, Spider-Man,Daredevil (and Marvel recently got him back), Punisher, etc. I had thought Doctor Strange was in that group too... IIRC he had a TV movie at least.