The plan was for the WDW location to be a flagship for an eventual chain here in the states (the original EOS restaurants are 2 delivery-only outlets in London). As popular as it has been at WDW, and if the value, freshness, and atmosphere don't change, I'm sure they'll really take off.
Hawaiian BBQ is my favorite (smoked ham, swiss, pineapple, bbq sauce, lettuce and tomato)