There's a P.F. Chang's in Gardenwalk... I don't think they'd bring it to DtD too. Though I wouldn't be surprised if a Chinese or Sushi place came into DtD.
Also, I don't think they'd bring in any fast-food chain restaurants (In-n-Out)... I'd LOVE to see one, but I doubt it.
Things I WOULD like to see are more quick eateries (an Earl of Sandwich would be nice), a Chinese or Sushi/Japanese place would be nice too... and then as someone said above, a Disney @ Home store would be awesome too.
Starbucks would be great, but that's another doubtful situation... and if they did bring one there, it better be staffed with like triple of what a normal store does, because almost everyone would be there.