I'm surprised it's not giratina vstar. Giratina seems way easier to build rotation proof with only a 2-2 or 3-3 evolution line. I don't know if I will buy this yet, we will have to see the decklist.
I'm 90% certain the league battle deck will be giratina vstar because dialga, palkia and lugia lose too much to rotation to be viable without using scarlet & violet cards which aren't out yet when the deck is printed. Arceus requires more than 3 V's and 3 V stars. We could also see a level 2...