Let's assume that there is no Switch 2 in 2023, which we don't know for sure right now. Let's imagine that apart from ToTk, Nintendo decides to save its big releases for the next system. That means no Prime 4, no 3D Mario, obviously no Smash, no Mario Kart, no Animal Crossing, no new Xenoblade, no new Pokémon, no new Splatoon, no new Mario Party and no sequel to Ring Fit Advanture either.
Let's imagine in these conditions what 2023 could possibly look like.
January: Fire Emblem Engage
February: Kirby's Return to Dream Land Deluxe
March: Bayonetta Origins
April: Advance Wars 1+2: Re-Boot Camp?
May: The Legend of Zelda: Tears of the Kingdom
June: Detective Pikatchu 2 (it was announced at E3 2019) or another Pokémon spin off announced during the next Pokémon Presents ?
July: The HD remaster that Namco is developing for Nintendo (Kid Icarus Uprising or Starfox Assault?)
August: A small multiplayer game from EPD 4? (maybe a sequel to 1-2 Switch or Brain Age)
September: Pikmin 4
October: Metroid Prime HD?
November: 2D Mario? (as a big holiday game, to take advantage of the hype around the movie)
This is of course nothing but a quite realistic assumption, it would leave big games aside for the future, but wouldn't exactly look like a year of catastrophic collapse. Not to mention the many DLCs already announced, plus the one probably coming with Zelda.
The question I want to ask is actually simple: does this change much of what we were expecting anyway? We have no idea what this console production story means, or if it is true. We don't know if this includes a future model or if it's about stocking up on the current Switch family.
The goal of selling 20 million or more consoles in the coming fiscal year has no concrete reality at the moment, let's wait and see what Nintendo says soon. But not aiming for those numbers doesn't have to mean a drastic drop just because we decided to think so.
Let's try stretch that lineup out to fall 2024. I made a few edits
January: Fire Emblem Engage
February: Kirby's Return to Dream Land Deluxe
March: Bayonetta Origins
April: Advance Wars 1+2: Re-Boot Camp?
May: The Legend of Zelda: Tears of the Kingdom
June: Detective Pikatchu 2 (it was announced at E3 2019) or another Pokémon spin off announced during the next Pokémon Presents ?
June: Switch Sports Expansion
July: The HD remaster that Namco is developing for Nintendo (Kid Icarus Uprising or Starfox Assault?)
July: Splatoon 2 Expansion
August: A small multiplayer game from EPD 4? (maybe a sequel to 1-2 Switch or Brain Age)
August: F Zero GX Online
September: Pikmin 4
October: Xenoblade 3 Expansion
October: Metroid Prime HD?
November: 2D Mario? (as a big holiday game, to take advantage of the hype around the movie)
November: Mario and Sonic at the Olympics
December: Pokémon SV Expansion
December: Final Mario Kart 8 DLC
2024
February - Zelda TotK DLC
March: Yoshi's Wooly World
April: Paper Mario Wii U Port
May: Twilight Princess HD, Wind waker HD or 2D Zelda
June: Tamodachi Switch
August: Xenoblade X
September: Pushmo World
October: Pokémon Let's Go 2 Johto or Black and White Remake
November: Metroid Prime 4 (Cross Gen)
November: Switch 2 Launch
This isn't including indie games and more 3rd party PS2/PS3 ports that could also come in the mix. Not the best lineup but not the worst as well. Around March/April they would announce the Switch 2 which will make people forgive the slow 2024 lineup as we go closer to Switch 2 release.