It does seem a bit redundant to have almost identically themed attractions in both parks, but I have a feeling that Peter Pan's Flight won't survive the next phase of expansions at TDL. After the Beauty and the Beast area opens, there will be a very stark contrast between that elaborately themed section and the old Fantasyland (specifically the cheap carnival tent facades). The renovation of this entire area was initially planned for this upcoming phase but has been postponed until further notice. When that does eventually happen, I can see them removing all traces of Peter Pan from Fantasyland (not including it's a small world).