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Now let me start this by saying I'm completely fine with the starters and their evolutions. This isn't me trying to say "maybe we'll get something better!" or whatever. But i watched a video and they made a good point about the last trailer.
In the trailer the last evolutions are all precisely shown on the moon side of the art in the background. That, coupled with the fact that primarinas info mentions how it glitters in the moonlight.
Adding this with the rockruff thing, and how cosmog looks more like lunala (i know people were wondering if it just evolved twice into lunala or solgaleo or if it were just one evolution for each). We could have just gotten only the moon info in that trailer.