Ugh. A few months back, an alien race called the Shi'ar kidnapped me and tried to put me in trial for things that the... well... version of me from THIS world did.
I know it's confusing. But basically, the older version of me, the one from this time, was once possessed by something called The Phoenix Force. While under it's influence, she caused a lot of death and destruction. But Older!Jean is deceased, so when they heard I had come here from the past... they decided I needed to be destroyed before I could do those things again.
The short version? The Shi'ar are a bunch of d-bags. And the Guardians of the Galaxy risked their lives to save me. That's why I volunteered to come up here and help them this time.