Memory Alpha's article on Star Trek: Voyager "Endgame" episode states (Continuity and Trivia):
Although dealt a crippling blow, it is unclear if the Borg have been defeated once and for all, as the pathogen may not have had enough time to spread (Michael Okuda claims, in the Star Trek: First Contact Special Edition DVD, that they weren't). Chronologically, though, this episode marks the final appearance of the Borg, although they went on to make an appearance on ENT: "Regeneration".
Is there any canonical information, beside above, on what happened later to the Borg? Or are we all left with just the mere speculations? Are there any non-canonical works, that deal with this?
Note, that I'm asking about chronological after, not about any work, that was written or created later than "Endgame" episode (like in Enterprise serie example).