Remember the 2009 reboot of “V”? Its failure is a reminder of what sci-fi should (and shouldn’t) be. — Alan Tudyk, Morena Baccarin, and the nostalgia for a rather brilliant 1980s miniseries. With a great cast, reasonable (for the era) special effects, and a proven pedigree, this show looked like gold on paper. So, why did it fail? We’ll gloss over some of the factors beyond the show, like…