Under the current rules (as of writing this blog post) both of them would simply die as a state-based action due to the planeswalker uniqueness rule, so nothing special happens
the one that you only open once in a blue moon if you're flush with cash, win it as a prize at your game store, or get as part of the annual Gift Bundle
A 1/1 Army might not be worth a card
Youll find 17 cards of rarity Rare or higher, including 1 Foil-Etched card and 1 Traditional Foil, in every pack
Players will be able to purchase Alchemy boosters either individually for 1,000 gold or fifteen for 3,000 gemsthe same price as Standard set boosters
With any of these Jund commanders youll dominate the board with red, black and green removal, sacrificial effects, and the biggest, baddest creatures you can conjure up