There'll be a clear winner - first past the post & all that. I agree it might not be any of the big three though, assuming any independent is planning to stand. Or UKIP, which would be bad but has a sense of inevitability about it.
Seriously though, if you actually wanted to become an MP but don't want to subscribe to the party system, now is as good a time to stand as any. You get a massively well aid job for at least a couple of years, can make a lot of contacts along the way and right now quite a lot of people would vote for a monkey provided it offered an alternative to the usual suspects.