I doubt seriously they will establish a character meal (especially a breakfast) in a resort off the beaten path like POFQ. The transportation situation is too difficult. Lunch doesn't pull in enough patrons as most guests prefer to stay in parks then or travel to either resorts close to parks or their own resort. Maybe a dinner, but Disney would have to be certain that guests would be willing to leave the parks and travel on the buses to go see Tiana.
I would expect that Tiana will eventually show up in at least one of the princess meal rotations (CRT or Akershus).
I think there's a reason why all the current character meals are either inside theme parks or in resorts very close to theme parks.