Trailer for the upcoming horror comedy, Ready or Not: [link]
First of all, that looks like a blast. Secondly, the heroine is a long-lost sister of Margot Robbie. Thirdly, holy motherlode of Canadian actor bingo! You've got Kristian Bruun from Orphan Black, Melanie Scrofano from Wynonna Earp and of course, Henry Czerny, who has played all manner of sleazy villains, Canadian or not, in his storied 30+ year career.
Also, I'm pretty sure they filmed it at Casa Loma in Toronto.
While I'm on the theme of "crazy murderous rich people stuck in a mansion," the trailer for Rian Johnson's new movie, Knives Out: [link]
GOOD LORD that cast.