That FAQ tells us that while many sets will transfer over, only cards from the Sword & Shield series and select sets from the Sun & Moon series ( Lost Thunder through Cosmic Eclipse ) will be transferrable at launch
Consequently, cards which support Duel Dragons or Signer Dragons as a group (such as "Ultimaya Tzolkin" and "Duel Link Dragon, the Duel Dragon") cannot simply support Level 7 and 8 Dragon Synchro Monsters without a clause that also includes "Power-Tool" monsters, lest Leo's cards be excluded
If Power Capsule Red is in your GY, then you can Fusion Summon a Level 4 LIGHT Machine monster with 800 DEF by sending monsters from your hand or field to the GY as material
The learn-to-play decks are a clever way to teach players the rules by putting them right into a game
So if you're playing a one-for-one game, where they play a creature, and you make them sacrifice it, eventually you're just going to have numerous copies of Chainer's Edict in the graveyard waiting to do it all again