The casual filmgoer isn't going to know anything about Narada having Borg technology because it's not on the screen. It doesn't matter if it's "official" because it's in the comics. If a comic or novel contains important information needed to understand the film and get more money from the potential audience, then the film failed to get its information across to that audience. Blame it on studio interference for running time or whatever, any film that needs to be supplemented by books or comics or bubblegum wrappers to understand it hasn't done its job right.
All this extra information stuff seems to have started with The Matrix