Back in the early 90s, there were a series of replacement Punishers. This particular Punisher is a black Brit named Outlaw (AKA Nigel Higgins). He's been around off and on, but he's not particularly well known.
Except that Outlaw will be appearing in Marvel Comics' upcoming CONTEST OF CHAMPIONS series, which debuts next month. Nothing specific has been said about Higgins taking over as Punisher. Except that the idea has been floating around in more than one online comic book website, which implies that it's going to happen.
So... will Marvel Comics be replacing Frank Castle with a black Punisher? That's the money bet, if you believe the rumors...