During an escape attempt by Nick Fury from undercover Hydra agents hiding themselves as SHIELD agents a well timed Penske truck smashes into a police car. Another time when evil Agent Sitwell is thrown from the car with Steve, Sam and Natasha he two also hits a Penske truck. Well co-director Joe Russo confirms (via Coming Soon) the driver of the both trucks is the same guy without giving a name:
"The man who drives that truck," Joe deadpans, joking that the driver is a candidate for a future Marvel One-Shot, "Is very highly trained. He thinks on his own terms. He's got a plan and a very specific skill set."
While making a Taken joke many have theorized that this could have been our first actual cameo from The Punisher in the Marvel Cinematic Universe after Marvel got the rights back from him. This actually wouldn't be his first reference. It has been shown that some of the mobsters directly related to his family's murder is in prison alongside Justin Hammer and Trevor Slattery as seen in the Marvel One-Shot All Hail The King.
Some are also hoping The Punisher makes his Marvel Cinematic Universe debut in the upcoming gritty Daredevil Netflix series currently shooting and debuting this May. Lets just hope they get Thomas Jane back as Frank Castle after the amazing job he did on the short film Dirty Laudry back in 2012.