The family of deceased professional football player Aaron Hernandez filed a $20 million lawsuit against the National Football League and the New England Patriots in Boston federal court, but there’s a chance the case may end up before the federal judge in Pennsylvania who is overseeing a nearly $1 billion settlement already in the works aimed at compensating former players for their brain injuries.

And that’s just one of several hurdles attorneys involved in class action and ongoing concussion-related litigation said the lawsuit may face.