Drone - so just because some Borg nanoprobes came into contact with the mobile emitter, it creates a "29th century Borg", um how? Where did the genetic material for the organic parts come from? This is about as contrived as Nuclear Man being born in Superman IV.
It would just be a Borg that happens to incorporate technology for a holographic emitter, not "29th century everything". Plus, the mobile emitter isn't from the 29th century, it's from the 20th century. It was created by Buddy Holly from reverse engineering Braxton's time ship, just like every piece of computer technology on Earth from the 1960s onward, according to Voyager writers.
You'd think the Voyager crew would reverse engineer the mobile emitter to improve their own technology, but nope.
Timeless
Infinite Regress
Counterpoint
Dark Frontier (I)