Good points, it's all a gamble I suppose. Making a major motion picture is no cake walk, but if they accomplish it, I'm sure they will throw a ton of money at a toyline. 7" may not be in the cards at that point the way the economy is going. Or they may have a rehash of MOTUC for collectors and release a 4" line with vehicles and playsets, only time will tell.
Thinking about it more, if they were to release a line at retail in a movie year using the current buck, they could sneak in figures that didn't make it into MOTUC. Hasbro does this occasionally with the multiple Marvel series.