And, as has been said COUNTLESS times on this forum, Enix was a rival company of Squaresoft, and the two of them had produced games together in the past. The merger didn't hurt the two companies any more than their own staff loss through unrelated reasons. The teams are still in essence separate entities, but they can now collaborate and pool their monetary gains.
Zidane: That's a big QFT Void. Squaresoft is responsible for the RPG giant known as Final Fantasy and Enix is responsible for FF's (before the merge)rival series Star Ocean, they combined forces around the FFX-2 period, and are now known as Square Enix.