In Unified Minds, there will be eight Tag Team cards, nine additional Pokemon-GX, more than 25 Trainer cards, and two new Special Energy cards.
Rowlet & Alolan Exeggutor GX
Psyduck & Slowpoke GX
Raichu & Alolan Raichu GX
Mew & Mewtwo GX
Espeon & Deoxys GX
Umbreon & Darkrai GX
Mega Sableye &...
As this set, those are the pokémon that didn't yet have cards in the S&M era:
Abra
Kadabra
Alakazam
Sentret
Furret
Pichu
Igglybuff
Bellossom
Aipom
Sunkern
Sunflora
Teddiursa
Ursaring
Smoochum
Elekid
Magby
Zigzagoon
Linoone
Azurill
Lileep
Cradily
Anorith
Armaldo
Spheal...
Could be Carbink, Dedenne (because we had a GX last set, so maybe), Sylveon (I don't believe it will be this, but..), Klefki, Xerneas, Diancie, Comfey, Mimikyu, Magearna or some new fairy Tapu.
YAY! Finally a Necrozma regular form card for my poke(card)dex +_+
With Silvally, in August I'll complete it, as the promo Silvally baby wasn't released in Brazil :(
This are the cards that didn't have cards in the Sun and Moon era after this set:
Abra
Kadabra
Alakazam
Exeggutor*
Sentret
Furret
Pichu
Igglybuff
Bellossom
Aipom
Sunkern
Sunflora
Teddiursa
Ursaring
Smoochum
Elekid
Magby
Zigzagoon
Linoone
Azurill
Lileep
Cradily
Anorith...
Nine Pokémon GX in the set, so probably we will get Starmie-Gx and Onix-GX, as well the cards from the Battle Decks.
If no, they will either release those cards in a mini set like Shining Legends, or we'll never get them.