A firm decision needs to be made now, before the GB starts, and members prepare their kits and reference material. Otherwise, we'll still be discussing this part way through the GB !
Personally, I agree with Cory and Wojtek - opening up the GB to developments of WW2 types, for example, the Twin Mustang, would be in danger of stretching the parameters even further.
I suggest we stick with WW2 types - those that are immediately recognisable as a type which served in WW2, that is, same shape overall, be it a later Seafire, for example, or even a Mustang or Corsair built after the war ended.
The original brief for the GB, for aircraft types which served in WW2, given a new lease of life, be it in a foreign air force, for movie use, as a civilian transport, sport plane, tanker etc, or on the air show circuit, covers a vast array of possibilities, and allows for a good variety of models.
Maybe the Judges should now decide, as a final to the discussion.
I vote for the description above, other Judges please 'chip in'.