Seeing as Step Up 3D will have its core audience and both film have made $18-20 million, I think the same can be expected of this three-quel. 3-D prices should help push it over $20 million by a little bit.
That brings us back to Inception, which should still decline at its healthy rate of a third at a time, positioning it for about $18 million. Dinner for Schmucks, even with a new comedy in place threatening to take a chunk out of its take, will find fourth with $10-12 million. Given the also slow rate of decline for Despicable Me, it should jump Salt for fifth place.