After reading more about the lawsuits and some history, I’m not sure what else Mick can get from them.
They signed contracts back in the day after Vince and Tommy quit stating that if a member isn’t touring, they don’t get any tour profits. Mick was one of the ones who pushed for that and signed his name to it. Mick is the last one to sell his publishing, which he owns 10% of, the other guys already sold theirs so there’s no royalties to collect on. As for merch, he can only collect on items that bear his likeness, they’re currently selling a shirt with him on it but once those are gone you know damn well they won’t print more.
They’ve already done books and a movie, I’m not sure how much more they can milk the band’s name via licensing while still collecting a big payday after the fact. I’m in Mick’s corner 100%, but I’d imagine whatever money is being spent on these lawsuits will be equal to whatever income he can actually collect on in the future.