So Super Mario Odyssey hasn't gotten a whole lot in the way of actual DLC outside of Luigi's Balloon World, but that hasn't stopped Nintendo from adding little updates here and there for the past few months.
One such update was just added, and includes two new outfits -- the Satellaview Suit & Helmet and Baseball Uniform & Batting Helmet. You can find these in the post-game shop.
I think there's enough Power Moons to keep me popping in and out of Odyssey for a while (I don't know if I'll ever get around to the jump romp one), but a real expansion would be pretty great at some point!
Nintendo [Twitter]
via destructoid https://www.destructoid.com/mario-s-new-odyssey-outfits-are-pretty-fly-496399.phtml