I suspect this is long after the time when spoilers are in effect, but in All-New X-Men #17,
Alison Blaire, aka Dazzler, gets elected as the first mutant president and is apparently assassinated via some sort of orbital laser before demons invade.
My question is, was it ever established who exactly attacked her? Those standing by her implied that this was an example of how humanity would never allow mutants to live in peace, and launches the next Brotherhood, but summoning demons seems outside of the usual government hit squad tactics. Of course, time travel means that it's entirely possible that future will never come to be, but was there ever any explanation, including commentary from the writers, as to who was supposed to be attacking?