I work near the Arboretum and have been noticing construction taking place at the old Dan McClusky's site. They finally have put up a banner saying "Kenobi Sushi Bar ...". I did a quick google search and it only turned up a craigslist ad looking for severs. The space has to be expensive so I was expecting it to be a chain, but it's hard to tell so far.
Personally, I'm a little tired of sushi places and was hoping for something more interesting, but I guess I'll wait and see how it turns out.