If we assume that the novels would have been filmed at roughly the appropriate time for the actors involved, personally, I'd easily take The Battle of Betazed. Hell, swap it entirely for Insurrection, and things are pretty solid for me - a movie that ties in to the DS9 narrative of the Dominion War (plus Crell Moset connects with Voyager, so in one swoop we get connective tissue with the other parts of the franchise at the time), gives a spotlight to characters OTHER than Picard and Data, and has an already greater cinematic scope to it... I'd have been pretty damn happy with it.