I'm guessing the parts of the collective which were severed but not diectly infected can revive the collective, if 'something' happens. That 'something' could be finding a new queen, a position maybe a perfect synth could fill......
this is one of the instances where i seriously hope they disregard exisiting lore. the whole borg queen buisness was an incredibly dumb idea. makes sense to have an avatar for the borg, so the characters in a visual medium dont have to interact with a faceless voice, but thats it. 7 of 9 acted as that in voyager, and the queen became instantly superflous in that role. she is only there to have a singular bad guy, and for hacks like rick berman to have an easy villain.
please, just let the destroyer be something original. im far too old (shut up) and cynical to get that nagging voice out of my head: Halie is right, its going to be another borg queen. the dumb
romulans made skynet, and then it became borg, thats why they hate cybernetics, its cybers all the way down INCEPTION FORGHORN.