Second wave of 1st Party free Switch 1 upgrades or Switch 2 Editions?

What are the chances that we see a second wave of upgrades, free or paid, for Nintendo titles? Personally i think its quite likely. Possible in the next Direct (rumored this September.

I am specifically thinking of games such as Smash Bros. Ultimate, Super Mario Bros. Wonder, Animal Crossing: New Horizons, Luigi's Mansion 3. What else am I missing?