If Tony and Pepper haven't yet gone public, it would be a good jumping off point if it was announced, as well as Tony saying he'll act as co-CEO with Pepper? She can't handle it all right, maybe instead of LA (just thinking aloud here) they could relocate somewhere quiet maybe close to where Charles' mansion where maybe they could stumble across the mutants in training? And I think Raven going in under false pretense but then changing her mind would make some good, heartbreaking conflict. We'd need to finalize who would still be around after the mess. There's Beast, anyone else...?