That's adding a small thing to a game, not increasing the size of an already large toyline and messing up their schedule. If they are going to do it, they will and a little push will have no effect if they won't. However, it ultimately it boils down to what Disney wants them to do. LEGO doesn't have as much freedom here as it does with City or Castle. Disney has to approve everything, always gets the last word, and can have the first if they want it.
I really don't care if we get sets based on the movie or not, to be honest. I couldn't stand the first movie, so I'm not really on board for the next 3+. Besides, the USM sets, as mediocre as they usually are, have much more potential than movie ones. I'd rather have Iron Fist, Nick Fury, Venom, and Dr. Doom than Lizard, Rhino, and Gwen Stacey.