This is probably the 1st trailer that left me with positive feeling.
1 000 Pok?mon in GO Park is a lot. I mean I have about 200 Pok?mon in Pok?mon GO, but I don't play often.
I was skeptical about Mantine's minigame in USUM, but loved it when I tried it. LGPE's minigame looks a little bit more repetitive, but that depends if there will be more threats. It could become fast way to farm candies or ended up like Super Training in Gen VI.
I was expecting that Alolan Forms will be available in the form of trade. I think that's probably the best way how to implement them in the games.
Only thing I really don't get is the last thing from the trailer. Battling with legendaries is fine... But why bother with removing wild battles and then putting them back only for 4(?) Pok?mon? That's just stupid idea.
Also for some reason, Pok?mon in the world look really alive in this trailer, while trainers looks like lifeless robots.