>>13088995No, this is flat out wrong. The trailers, especially the earlier ones, are created from scratch and feature original animation / story points. Almost nothing from the trailers make it into the final Pokemon movies. I take it this is your first time following a Pokemon movie's advertising campaign?
So since WPM says Ash did not specifically remember the original Mewtwo, that's all it means. It's not one way or the other if he remembers it or not. Personally I think that if I saw Mewtwo again I would make mention of it, so IMO the writers are either retconning things or they just don't care to go off topic and explain about the old Mewtwo.