Maybe one with really cool graveyard synergies or one that works well with planeswalkers, and if Wizards really wanted to go crazy they could throw a legacy playable card in one of the decks so it would actually sell copies
Quick Draw Spellslinger decks in red and blue are nothing new, but Quick Draw has a cool Commander in Stella Lee, Wild Card, which gives you access to more spells to cast, and the ability to copy instants and sorceries
The number one problem that these decks run into is that the sideboard hate they face can be daunting to play around
Not only does this enchantment reward you with treasure when an opponents creature dies, but you just win the game on your upkeep if you have 10 or more treasures
The problem with this mechanic is especially evident in staple cards like Fezandipiti ex, which every modern meta deck plays for its ability to draw three cards in the turn after your active Pokmon is knocked out by an attack