As an easily noteworthy Rise of the Floodborn Amber card, TCGPlayer currently lists Mufasa: Betrayed Leader at a market value of $40.92
Disney Lorcana has already revealed several powerful cards from the set that could have a huge impact on the game
Same if you have some Hero cards from previous sets, they should be great to include, and represent an immediate upgrade
On the sapphire side, cards such as Winnie the Pooh, Having a Think will help you to build up your inkwell quickly, giving you more resources to play cards on your turn
You can pre-order these now at your friendly local game store for release day on November 15th, or order them online at places like Amazon or TCGPlayer though you should receive them two weeks later on November 25th
Also sometimes known as "pack filler"