You get bodies, sure, but also a board thats suddenly large enough to threaten multiple players
Creatures don't get held as much as spells
In a follow-up post, the Disney Lorcana account clarified that most reprints from The First Chapter will be indistinguishable from the original run, though certain cards will be reprinted with errata, or changes to their official wording
This process rarely covers all of the possible decks you could potentially face at an event but it will give you a good idea of what you're weak against
You can mix Jumpstart boosters from different sets for extra fun and/or chaos
Ill put some of the highlights in order, then gold, just for people to know what they can expect out of these: Kenrith, the Returned King Akroma's Will Urza, Lord High Artificer Counterspell Cryptic Command Rhystic Study Yawgmoth, Thran Physician Bolas's Citadel K'rrik, Son of Yawgmoth Ragavan, Nimble Pilferer Ancient Copper Dragon Primeval Titan Atraxa, Grand Unifier Tymna the Weaver Isshin, Two Heavens as One Thrasios, Triton Hero #45