i just want to say that when storm tells logan "are YOU ready to do what YOU need to do when the time comes." I don't think she was talking about being part of the team. in context, it's clear he is. He just said "we're x-men, all of us." right?
She was definitely talking about killing jean, dead.
It's so clear.
during the battle, storm looks at jean and seems ready to face her but then she looks at logan to see if he's willing too as well since earlier she reminded him that they have a duty and love shouldn't get in the way basically... and, wolvy says he's the only one who can stop Jean. Storm reassured logan got the message, flies off to get the hell out of there.
I think that's how it is, my interpretation anyway.
she does seem to not have any hope left at all for Jean after she kills to prof. I guess they weren't that close.