Yes, it is Ronan from Guardians of the Galaxy and Captain Marvel. I love this crossover. 

Xavier is alive and has an exoskeleton

That allows him to walk. 

He is also on another planet, playing King Consort to his queen. His sister-in-law is trying to usurp his wife by using the fact that Xavier is a “lesser human” from Earth as an excuse for why Xavier’s wife is not fit to be queen.

Having had enough of her nonsense, Xavier uses his powers to transport every “elite” person on that planet to the astral plane to teach them unity. 

However while in the astral plane, he sees visions of his children. 

Gambit is dead.
Genosha was a trap. 

So Xavier decides to return to Earth. 

Ororo becomes Storm again

The bird that bit Forge feeds on fear — Ororo’s fear. 

Ororo was able to conquer her fear and tap into her X-gene which then made her super powerful — more than she ever was. 

Well, that is what I think because she is so powerful now, she grew out her mohawk in seconds. 

You see, LEGENDARY!

I liked this episode

It was focused on fighting personal battles. It was about being afraid or conflicted and conquering that self-imposed restriction. 

Loved that!