We create ghost projects. Like, lots of them. Basically just ideas, like what a patent troll would do. "Pokemon Lemmy: it’s a Pokemon clone with a Lemmy inspired story."
Officially tell relevant companies and start a 3 yr clock.
They are forced to treat every nothing-project as if it’s a big popular IP stomping hit.
If they don’t do anything about the nothing-project after 3 years, you pick it up for real.