We've done take out from Kimono's at the Swan many times, but that was for taking back to the room for me and the kids if we were tired and just wanted to watch a movie or something. It isn't cheap (I typically spend about $25 per person, and that is for kids, okay my son isn't a cheap date!), but theirs is quite good.
If you were going all the way back to the MK to watch Wishes, I'd do a different type food. But you could get it from Kimonos and watch Illuminations, or just people watch on the Boardwalk, as that is a five minute walk.
My good friend went to Kimonos with her 4 boys once, and they let her order sushi and brought the boys the childrens menu from a different restaurant. I really like the service at the Swan!