When I first started reading comics about a year and a half/2 years ago, I remember seeing him show up every so often and killing some random fuck, mostly in one of those "mini" comics at the end of an issue. Sometimes you wouldnt even see him, just a bullet flying from the fucking skyline into the sky and killing some asshole U.S. Agent was flying off someplace on those scooters. It was so bizarre. I recognized a lot of the villains who were revived in this run, but I never can across the comics where the Scourge showed himself formally.
May be part of the reason why I liked this whole Punisher volume, between that, the blood stone, and some of the monsters, I felt like I had enough prior knowledge to fully enjoy it.
Or in other words "I understood that reference"