Who knows? Maybe the Enclave might eventually be seen as the good guy they say they are?
Although anyone who's seen me around the boards for... well, any length of time, really... will be able to tell you that I'm an Enclave supporter, I'd be as disappointed to see the Enclave portrayed as 'good guys' as I would be with their portrayal as flat-out, irredeemable villains. One of the things I've always loved about the Fallout series is its gray-and-gray morality.
That said, while I also don't want to see the Enclave as any significant presence in Fallout: New Vegas (or any future games), it would be nice to, say, run into one or two individuals affiliated with them.
This goes for the Brotherhood of Steel, as well, come to think of it.