Interesting take....if Thanos did what he did because he knew about Galactus somehow. It would be a big stretch though and honestly it wouldn't make much sense. Galactus will be hard to do because of CGI but I think they can pull it off. What might be harder for them is to make an ACTUAL GOOD FF movie. Again if Doom gets his own film as is rumored then that would actually be a great thing instead of tying him to the FF all the time. He's a universal villain and honestly has just been weighed down by the FF affiliation so far.