Not yet, I'm guessing we won't hear anything about Surefire's plans until the shot show in three weeks. Personally I'm hoping the L4 won't be updated for another 6 months or so............. But that's because I just bought one and I'd like to get some use from it before an upgrade comes out.
Edit: Oops, I read the question as "has anyone heard anything about....." In regards to the actual question. Probably. I think they're currently working on an improved L5 so I'd imagine an updated L2, L4 (and maybe even an L7) will follow relatively shortly after. We'll know for sure soon enough.