I used inspect element to yoink the background from the Switch 2 website with all of the (presumably) currently confirmed backwards compatible games, if anybody wants it.
The list seems to be as follows:
- Mario & Luigi: Brothership
- New Super Mario Bros. U Deluxe
- Princess Peach: Showtime!
- WarioWare: Move It!
- Mario Strikers: Battle League
- The Legend of Zelda: Echoes of Wisdom
- Kirby and the Forgotten Land
- Splatoon 3
- Pikmin 4
- Clubhouse Games: 51 Worldwide Classics
- Super Mario Party Jamboree
- The Legend of Zelda: Tears of the Kingdom
- Animal Crossing: New Horizons
- Xenoblade Chronicles 3
- Super Mario Odyssey
- The Legend of Zelda: Breath of the Wild
- Pokémon Scarlet & Violet
- Fire Emblem Engage
- Nintendo Switch Sports
- Metroid Prime Remastered
- Luigi's Mansion 3
- Super Mario Bros. Wonder
- Donkey Kong Country Returns HD
- Paper Mario: The Thousand-Year Door
- Super Smash Bros. Ultimate
I can't make out the games to the left of Super Mario Party Jamboree and Luigi's Mansion 3, though. If anybody has guesses as to what they are, I'd be glad to hear them.
Edit: Some commenters have said that the unidentified games are just repeats of Showtime and Clubhouse Games. This seems to be correct from what I can tell. Thanks to u/Brimickh, u/mrafflin, and u/WordStained for being the first to figure it out!
