After Pokemon Scarlet and Violet, there's another type trio that the developers may want to experiment with for the series' starters. Pokemon Scarlet and Violet maintained the tradition that the series has kept with its starters since the beginning. However, there was an extra bit of flavor added to the mix in the latest generation. Of course, every generation's starters have had something that makes them unique. Even with that in mind, there's a real chance for the games to start getting a little more experimental. Scarlet and Violet made an excellent argument for doing just that very soon.
The types of Pokemon's starters have followed a pattern since the very first games. Each region's trio of starters has almost always consisted of a Grass-type, a Fire-type, and a Water-type. This has not only given every new game a sense of familiarity, it has ensured that every starter has a marked advantage over another in the trio, and the player's rival traditionally chooses the starter that's strong against their selection. This format even appears in spin-offs, such as Pokemon Legends: Arceus and Pokemon Trading Card Game. At this point, it's safe to say that the starter dynamic is here to stay.
Pokemon Yellow and the Let's Go! games are the only mainline Pokemon titles to not use the usual starter formula.