What Is 'Dark Phoenix' About?

X-Men: Dark Phoenix hits theaters this summer, according to comicbook.com
What's the film about?
In the film the X-Men face their toughest enemy when one of their own, Jean Grey, spins out of control.
Jean is nearly killed when a cosmic force hits her during a rescue mission in space.
The force makes her more powerful and more unstable.
Now, the X-Men must come together and save her soul before she destroys the galaxy.