Localization Leak incoming, heres the details of what I can offer.

Info of the game
>The official name of the sequels are Pokemon Eternal Sword and Eternal Shield.
>There are going to be 5 brand new galar pokemon in this game
>The pokedex is being expanded by 100 more pokemon.
>This game has 2 new gym leaders, the Eternal Sword exclusive being Electric and the
Eternal Shield one being Flying.
>The story is being completely changed, so this isn't an USUM more as a B2W2.

Story Info
>You Start in Wyndon and make your way down the map, the order of the gym leaders has been mixed and matched and there teams have been buffed and nerfed depending on when they appear.
>The main rivals of the game are a new character Ike and Sun and Moon’s Lillie. Seems like theres a new theme of main rivals being 3 letters long now.
>Lillie will show up sometime after the first gym, on her way to kanto she gets steered off course and ends up in Galar.
>The only mention of leon i've seen so far while working is him being called a "Legend of his time" so I don't think he will be in this game.

Post Game Content Info
>Team rocket appear again as Team Royal Rocket, although from what i've seen this is just a carbon copy of rainbow rocket, so we'll have to see.
>Other than that theres really no post game

Additional info
>Games will feature a graphics update, or so i've been told.
>Game will be $60
>Wild area will get alot of new spawns from the 100 new pokemon.
>Team Yell are still the evil team, yet this time from the dialog i've seen they seem to be evil this time, trying to kidnap and hurt marnie along with other gym challengers.

I'll be taking questions and responding with answers for anyone with questions.