If Wizards focuses on Selesnya as a guild rather than a color pair, I could see additional populate or convoke cards in the deck, like Growing Ranks, Sundering Growth, and Hour of Reckoning
Multicolor Inevitable Defeat Probably not good enough for three color, but interesting in the way Esper Pixie has shown with Hopeless Nightmare, where the ability to interact with an opponent while taking out chunks of their life can be something you can build around
"Pokmon TCG Live also comes with a suite of improvements, including a new card logic engine that provides more player feedback around gameplay events, as well as a Ranked Ladder, Battle Pass, duplicate card protection with Credits, 3D avatars, updated visual effects, and more fluid gameplay." You can catch the new avatars and snazzy visual effects down here in the announcement trailer
The back faces are a variety of things
8 Tidus, Yuna's Guardian From Final Fantasy 10 Hailing From FFX, Tidus Is Master Of Proliferation Final Fantasy 10 is a classic of the series, following Tidus as he and Yuna fight to save the world from Sin, a monstrous creature bringing destruction and chaos
Black pretty much cornered the market on all the cool legendaries in this set