Thought the ending would be an open for a part 2

ok... possible spoilers because I am going to talk about the end....

Since the Dr was part of it.... I thought he was a "winning contestant" and a clause of the winning was he had to suggest someone else to play (Iris) so you win- but don't fully win unless you put someone else up to play.
A way to have a part 2 would be Iris would have to put someone up to play at the next dinner party.

They can still do a part 2- All movies seem to have a part 2.