USUM should have all the old legendaries again now thanks to VGC

How are they gonna incorporate them in this time? I think the best option is that we find them through Ultra Wormhole travel or through Mantine Surfing, similar to ORAS, and now with two options it shouldn't feel as cramped

Maybe they'll even play a role in the story this time? Like they all gathered to Alola because they sensed the threat from the Ultra Beasts, it adds a really great sense of scale to the story