Just this morning we got two new trailers for Pokémon: Let's Go, Pikachu! and Eevee!, but that's not all The Pokémon Company had in store. Another new trailer just released in Japan. If they're not careful, they just might spoil us! This one runs a minute and 24 seconds and covers various features we've seen before, but there were at least two key moments that revealed exciting new info.
The first comes around the 37 second mark when we see what appears to be a battle between Pikachu and the Legendary Pokémon Zapdos. We never get a clear look at the battle stats, but it appears that you'll fight Zapdos (and presumably other Legendary Pokémon) the same way you would in any other game. This differs from standard Pokémon in Let's Go, which are caught the same way (no battling) as in Pokémon GO. Around the 50 second mark we similarly see Pikachu battling with Moltres.
The second new reveal of note is a blink-and-you'll-miss-it moment about 54 seconds in. Prepare for trouble, and make it double! That's right, Jessie and James of Team Rocket are returning! They weren't in the original Red and Blue, but they were added into Yellow to make it more like the anime. Given that the Let's Go games are successors to Yellow, it's a fitting touch.