You can see the trailer, which also features Hulk, Iron Man, War Machine and Captain Marvel (Carol) at Entertainment Weekly.
The film's official title is Marvel’s Avengers Confidential: Black Widow & Punisher and it stars, respectively, Dexter‘s Jennifer Carpenter and Call of Duty: Modern Warfare 3‘s Brian Bloom. The direct-to-DVD release is slated for a March 25 release.
You can check out the official description below.
“After interfering with a top secret mission, The Punisher is taken into custody by S.H.I.E.L.D. agent and Avenger Black Widow. At the orders of Director Nick Fury, Punisher and Black Widow are sent on a mission to stop Leviathan, a global terrorist organization that plans to sell stolen S.H.I.E.L.D. technology to the highest bidder. Now, the vigilante and spy must work together to prevent this technology from falling into the wrong hands. The fate of the world, and of the Avengers, hangs in the balance.”