Johnson mentioned on AICN that he was working on a theatrical version, and that this new TV version wouldn't affect his.
Sure, because there's such an appetite for new V that they can simultaneously market a new TV show and a feature film that are entirely unrelated.
I'll be stunned if either of these projects see the light of day. As much as I enjoyed the original miniseries when I was a child, very few people even remember it outside of sci-fi geek circles.