The Avengers movie Blu-Ray/DVD is currently on sale, and found exclusively on the Blu-Ray edition is the following Captain America deleted scene featuring the Acura RDX.
We've seen snippets of this scene before, which also features Stan Lee, but included we see Steve Rogers walking past an Acura store display with the new RDX.
It's also been said that some of the footage of Captain America that was deleted from The Avengers may make its way into Captain America 2.
I seem to recall that early on either Joss Whedon or Kevin Feige mentioned that Captain America was going to be the center of focus for The Avengers movie, but they obviously went in a different direction, which explains all the deleted Cap footage.
Following the luxury automaker’s integration with THOR in 2011, Acura built on its established role as the official vehicle of S.H.I.E.L.D in the hugely successful, Marvel’s The Avengers. S.H.I.E.L.D., the international peacekeeping agency of the Marvel Universe, had a leading role in this film portrayal of the iconic comic book series. Throughout Marvel’s The Avengers, S.H.I.E.L.D. agents drove various Acura vehicles, including the MDX, ZDX and TL models; the completely redesigned 2013 RDX made a cameo appearance. In addition, an Acura convertible sports car was created specifically for the film.