We did see some Disney stuff there, but not much. The store is basically the same as the mall ones. That's not a bad thing, but in my opinion, DTD has let too many of these "non-Disney" stores in and it takes away from the magic of Disney that used to even be carried over into DTD.
Yes, the costumes originally were exclusive to the DTD BABW at one time, which is when we first got the bears' costumes there. An employee there was lamenting the corporate decision to start selling Disney merchandise at the regular BABWs. Still, I will pop in at my next visit to get some Stitch stuff!
When this HUGE BaB went it, you couldn't find them at every mall. It was a bigger deal in the shop and what they carried but things change and these companies grow. The weird shop for me is Illuminations, while I like it, why is it at DTD???