Hot take: If no one knows who has the rights to sell it, no one knows who has the rights to stop someone else from selling it. There'd be a legal battle. For a game like this, its probably not worth it. But I bet by the end of it we'd figure it out.
You could figure it out, but if you're the one getting sued, it's going to cost you a lot of money to pay their lawyers to prove that you didn't have the rights, and someone else did.
