Well only if they brought that one guy back in, if it was the whole studio then I would feel pretty uneasy :s
As far as I know, Ken Rolston and Mark Nelson are the only former Bethesda employees who are currently working for Big Huge Games developing Kingdoms of Amalur: Reckoning. Both of them alongside Todd McFarlane were the cause of my initial interest in the game. A few devchat demos later and I am ridiculously excited for it.