This place perfectly summarises newest Pokemon games.

You have this cool looking, mysterious location with the feel of history and magic. Sure its a corridor like everything in gen 7 but it still looks like it should have some massive weight in the story and lore of SM. You'd expect grand things if visuals are anything to go by.

What is it in reality?
It exists solely for the purpose of a 5 second cutscene where Solgaleo and Lunala appear for a moment to give you a spare Cosmog. Not even for any big purpose. Its just a spare so that you can trade one away and it has no meaning whatsoever (unlike Nebby). They could've made it appear anywhere else (fucking altar?). USUM doesnt change anything about it either. Seriously whats the point of that?

Thats basically what newer games are aswell. Everything looks huge and fantastic on paper (read: trailers) and then ITS FUCKING GROUDON