Alright lads, here comes the only leak that matters.

Zacian is Fairy/Fighting, Zamazenta is Fairy/Steel.

Galarian forms for Meowth, Farfetch'd, Seel, Shroomish, Baltoy, Gothitelle, Reuniclus, Klink. Marnie uses Gothitelle, Bede uses Reuniclus.

Giganitmax Forms include Kanto and Galar starters, new legendaries, Wailord, Flygon, Tropius, Vespiquen, Maractus, Hydreigon, Goodra, plus a bunch of the new pokemon.

No new types.

No battle frontier.

Chairman Rose is secretly the leader of Team Yell, Marnie is his daughter or something.

Final gym is version exclusive, Dark in Sword, Psychic in Shield. Third gym is Fire.