Was just about to post that. Not sure if they're kidding or legitimately laying the groundwork to introduce Frank Castle into the MCU. They did mention him (not by name but it's likely Punisher based on the description) as a candidate for a future Marvel One-Shot. I think a One-Shot short would be a good way to introduce the character into the MCU, possibly as a candidate for the second round of Netflix series (since those all seem aimed at street level characters). A One-Shot would be an affordable way of gauging interest in the character, especially since it wouldn't require any CGI or anything prohibitively expensive.
Either as a film or TV series, it's a ways off, probably at least 5 years down the road.
If it was meant to be Punisher driving the Penske truck, it brings to mind the question of how Frank knew about the goings on at SHIELD, specifically Fury being targeted for assassination by Hydra and where Cap, Widow, and Falcon would be when Sitwell was thrown from the car by Winter Soldier.
Still, if it's true, it's a VERY subtle and ingenious way of introducing the character to the MCU without even needing to cast any actor for the role yet, nor even mention him by name.
We'll see. They could just be messing with people, and the same Penske truck was used merely since they already had it on set for the first scene.