I'm not sure how consistent that is with Destiny. Doesn't matter anyway, since Countdown disagrees with the novel continuity in multiple other ways, like the fate of Data and B-4.
There are a few continuity errors. One being that Picard is no longer the captain but an ambassador, as well as B-4 now being Data. Something that STO has done as well. There is also no mention of the dreaded Typhon Pact as well.I'm not sure how consistent that is with Destiny. Doesn't matter anyway, since Countdown disagrees with the novel continuity in multiple other ways, like the fate of Data and B-4.
The Borg one still works however as the novels do say that there are still some Borg tech lying around. Only tech that was currently connected to the hive mind was dissolved. The remaining technology could have been used to enhance the Narada.