I was just thinking the other day that while they're doing the remastering for TNG (and hopefully DS9/VOY in the future) they might come across the original footage for Borg (and Klingon)
The footage for the games was filmed
on the "Star Trek" sets at Paramount, but the scenes were not filmed by
Paramount. The original footage would have been with the licensee, Simon & Schuster Interactive, (and with Interplay for "Starfleet Academy" and "Klingon Academy") and, once they no longer held the license to make Star Trek computer games, the original footage would no doubt have been destroyed, since they could no longer profit from them, or even rerelease them, without renewing the license. It costs money to store this stuff.