Mystique maybe. I wouldn’t count on Cable for awhile as per Brevoort, though I wish it were otherwise. And as for Excalibur, the main players of previous Excalibur runs are all accounted for elsewhere (Nightcrawler on Uncanny, Kitty in Exceptional, Betsy/Captain Britain and Rachel in X-Force) so I’m not sure who would even be on it.
I’m getting Uncanny X-men, X-men and Wolverine for sure. Will give Phoenix and Dazzler a shot. Maybe X-Force but I really don’t love the cast and am not optimistic that it will sell books. It’s lacking a hook for me personally, despite my usually being the target demographic for an X-Force series. But without Cable or Wolverine, it just doesn’t feel like X-Force to me. Just a personal preference of course.