Hello! Again, welcome.
It's not unlikely at all that they'd run into one another somewhere somehow! An idea in addition to yours was that what Jessica is looking for is someone's kid and the details leads into the direction of Marie, very possible that she/he could be associated with her. Could possible insert some trouble that Jess could help with, depending on it goes, Marie would be willing to help (or not). We don't have to decide, the outcome but it sounds like something to start with. What do you think?
As for the rest~~ Kamala is a lot of fun! Very upbeat and still really new at the hero gig. Jean and the professor def works for the Institute later on and if you wanted, we could potentially in the future work with Rogue and her mental blocks, if you were ever in interested in taking that route. Tony is nice ok but Stryker is not. MJ is all around everywhere actually haha, she's got a penchant for getting into trouble so if you wanted Marie to "do good" and help someone out, she's pretty good for that as well. And no, currently she is not interested in weed xD