I wasn’t expecting fireworks over Labor Day weekend, so I shouldn’t be disappointed that none materialized. As expected, The Possession dethroned The Expendables 2 to bring summer 2012, officially, to a close.

If summer started off white-hot with Marvel’s The Avengers, it looks like it will end ice-cold with the lowest-grossing number one finish of 2012.  After a weak Friday box office, it looks like The Expendables 2 will earn a second weekend at number one with just $11 million in expected grosses. The weekend’s other titles should all fall short of $10 million by Sunday, including the new releases Premium Rush, Hit and Run and The Apparition. The only notable feature of Friday’s top five is the performance of the political documentary 2016 Obama’s America. After hanging back in limited release since July, the feature-length attack ad moved into 1,091 locations on Friday where it brought in a solid $2.2 million. We’ll have full details tomorrow.

With Ice Age: Continental Drift the only wide release of the weekend, any wonder it’s number one? The fourth installment in Fox’s decade-old animated franchise took in an estimated $46 million from 3,881 locations. That’s a bit below the average debut of the first three Ice Age films and noticeably lower than this year’s other animated hits; but with international numbers steering the sequel past $300 million global by Sunday, no one at Fox is sweating the small stuff.

In the event that you haven’t picked up all of the previous Marvel movies separately, the studio has a beast of a Blu-ray collection headed our way.  We previously reported that a 10-Disc special edition set was in the works, and now Amazon has provided a listing for Marvel Cinematic Universe: Phase One – Avengers Assembled.

Hit the jump for more details.  There’s currently no official release date or price for Avengers Assembled, but Amazon says more information about the set will be announced on July 15th, which makes a 2012 release highly likely.  The Avengers will hit Blu-ray, 3D Blu-ray, DVD, and Digital Download on September 25th.  If Avengers Assembled does hit this year.