A card must already be exerted in order to be challenged, meaning you cant challenge characters played on your opponents last turn
Every pack has a 50% chance of having a JP alt art Planeswalker

$1.49 Rejoin the Fight (0118 - Extended Art) Final Fantasy Commander Decks Variants $4.99 Krile Baldesion (0176 - Extended Art) Final Fantasy Commander Decks Variants $2.99 Espers to Magicite (0114 - Extended Art) Final Fantasy Commander Decks Variants $2.49 Yuna's Decision (0125 - Extended Art) Final Fantasy Commander Decks Variants $2.49 Observed Stasis (0113 - Extended Art) Final Fantasy Commander Decks Variants $3.49 Umaro, Raging Yeti (0156 - Extended Art) Final Fantasy Commander Decks Variants $0.99 Blitzball Stadium (0111 - Extended Art) Final Fantasy Commander Decks Variants $4.49 Siegfried, Famed Swordsman (0149 - Extended Art) Final Fantasy Commander Decks Variants $3.49 Dancer's Chakrams (0105 - Extended Art) Final Fantasy Commander Decks Variants $5.99 Setzer, Wandering Gambler (0183 - Extended Art) Final Fantasy Commander Decks Variants $1.49 Summoning Materia (0124 - Extended Art) Final Fantasy Commander Decks Variants $0.49 Coin of Fate (0104 - Extended Art) Final Fantasy Commander Decks Variants 0 results found

And even in parts where players are less familiar with the games story, the actual gameplay more than makes up for that gap, with powerful combos and synergy
1x foil card (random rarity level with a chance of the highest rarity, Enchanted)
Id love to see it happen, but I just dont think its likely