In the episode, it said it was "as if Odo and Curzon have been joined".
From what we know about Trill from the unimaginatively titled first season episode "
Dax" and elsewhere, a joined trill becomes a new entity.
"Curzon Odo" is not Curzon and not Odo, but a new individual with elements of both.
If this is the card the gets picked, it should be the character depicted in the episode
Facets played by René Auberjonois. We are
not creating a card of Curzon Dax (although one could be created one day from his appearance in
Emissary). So, I would argue against any specific Klingon stuff being included since that was not present in the episode.
Making "Curzon Odo"
would make as much sense as making
Ezri Dax