No actually. (Maybe?) The Borg raided up and down the Neutral Zone to see if the Federation or Romulans were worthwhile for assimilation. The Borg were not interested. If that was the same Cube that did it's business at the end of Season one, it was on it's wayback to he Delta Quardant sad that the Alpha Quadrant sucked and the Queen back home might not have sent another cube back to check on the status of this area of space for another 50 years. (When you go fishing, you have to chuck the little ones back.) But do you know what changed their mind? Q Either they recognized that the Federation had a relationship with the Q they could leverage, or they mistook Q transporting the Enterprise for a stardrive using an unknown and interesting method of propulsion they could assimilate. Suddenly the Fedration became a prized target.