If there are GBA games coming to the Switch, the ones I’d like to see are the Super Mario Advanced series with the fourth one getting the Wii U treatment, Minish Cap, Link to the Past/Four Sword, Metroid Fusion, Metroid Zero Mission, Drill Dozer, Pokémon Pinball Ruby and Sapphire, the Golden Sun games, Mother 3 (please just give it to us here in the west!), Wario Land 4, the Warioware games, Kirby Nightmare in Dreamland, Kirby and the Magic Mirror, Mario and Luigi Super Star Saga, the DK Country GBA remakes, and the Boktai series.
If they do this, I'd hope that they'd add the games to the eshop as well, for anyone who decides to not upgrade their NSO account, so they can have a chance to buy them.