1. The price of the game, which from rumours is likely to be between £70-80. This is probably just for the Switch 1, as it is known the Switch 2 games will cost more to lease.
2. The difference between the performance of the gameplay shown in the trailer, to the performance of the actual gameplay. A lot of pokemon fans probably don't care for it, until the game releases, and then comes the backlash from said fanbase. Most of the pokemon games from gen 8 to gen 9 were not optimal or were very buggy/glitchy.