Oh totally. Every game has some kind of covert hint to the next game that only makes sense in hindsight.
They just aren’t hunting at starters with these raids
See I can’t entirely buy that because of Torchic. We already know that every Kanto and Hoenn starter pokemon will be in the game, because they all have Megas. Torchic will be in the game no matter what.
So if we get another set of mixed starters I don’t think Torchic would be part of the line up when they have the chance to pick someone who wouldn’t be present otherwise, like Litten, Scorbunny, Tepig, etc.
I really think the trailer thing was just a coincidence. But hey what do I know, I could be wrong.