The Pikachu included will be Birthday Pikachu, a promo card designed to be given as a gift - it even features a space to write the recipients name and features a unique ability that does more damage on the players birthday
You could theoretically run a deck that doesn't care about reanimation at all and still get a good game out of TevalTeval, which is not something you can say about KotisKotis
See the cards from these decks in the new Card Image Gallery, which features updated information about all of the amazing cards in Wilds of Eldraine , such as the exciting Booster Fun treatments in the set
With flying, trample, and haste, it comes out swinging right away, and when it connects, you draw cards and pile on +1/+1 counters equal to the number of different permanent types in your graveyard, turning every sacrifice into fuel for both power and card advantage
The interface is older than Arenas, and the graphics are simpler, but you can find a game at any hour