It's done filming! Didn't even know it was filming yet. Also some huge cameos spoiled for the film in a video leak!
Spoilers for cameos! (won't post the link as it has spoilers in the title.)
spoilers:end of spoilers
Batman, joker from ss (no word if it's jared leto) , jim carrys the mask, witch from wizard of oz, pennywise from it, mad max, clockwork orange, Voldemort from harry potter, and agent smith all has cameos!