It's absolutely of no importance who or what V was under the mask. He isn't a who or a what, he's an idea. The thing is, you couldn't continue it. Now and then the idea of a sequel has been raised, in vague forms, but I think it would be a bad idea. The story's finished.
Alan was always interested in politics in a major way. He actually believes that anarchy is a politically viable system, but I don't. I was always interested in putting forward the ideas that represented my viewpoint. I feel the same about anything I'm doing.