How about new foulders, like "Luigi and Daisy", "Luigi and Yoshi", "Daisy and Yoshi", "Another Groups", "Events", 'Sketches", "Humanization", "Fanfictions", "Comics", "Crossovers", "Animations", "Icons", "Stamps", "Fan Buttons", "Memes", etc.
Personally, I think that the next Mario game should have four playable characters, like Super Mario 3D World, but it should have Daisy and Yoshi instead of Peach and Toad.