Deadpool is the only Fox X-film franchise that has a chance of surviving (leaving aside things already filmed), assuming X-Force counts as a Deadpool property because that still has a chance.I imagine that Deadpool is going to be the only current property to survive the buyout without change based on Iger saying they keep his movies rated R. Plus Ryan Reynolds doesn’t seem worried at all. I’d be curious if he had already had some discussions with Disney and Marvel.
Legion is supposedly ending naturally. The question I have is whether The Gifted would continue. It was already co-produced by Marvel so I wouldn't say it's impossible that it'll continue at least until the first X-Men film comes out.