Luminario
Smash Lord
I'd say using only Odyssey related stuff for her moveset is a severe waste of her potential when compared to things like Mario vs DK.In the same vain, Pauline could have a completely made up music themed moveset with elements of Mario's Odyssey moveset ala the hat throw. Both of them were just NPCs who got a boom in popularity thanks to the game they appeared in.
I don't think their situations are exactly alike here, but I think Pauline's appearance in Odyssey has put her in the same situation as Rosalina pre-Smash 4: unlikely to most but with good hidden potential. We have no idea if Sakurai will add her like Rosi though.
Because she has important history with Nintendo. She's the original damsel-in-distress, and has appeared in multiple games since. Ninty knows she's popular which is why she got focus in the Odyssey renders.To be entirely honest I don't know why fans (or Nintendo for that matter) are promoting Pauline so much considering she does just as little as any other NPC in Super Mario Odyssey.