A lot of them will need to be commons and uncommons, and the like that they won't put into standard. So Dark Ritual, Stone Rain, and Counterspell seem like easy choices, but I think they're afraid to have those cards in limited (though they were fine for all the years they were in limited at common). More likely they'll print sidesteps like Culling the Weak, Pillage, and Force Spike. Likewise, I'd be surprised to see Lightning Bolt, but not to see Flame Slash, Burst Lightning, or maybe Chain Lightning.
And there's 63 of them and they are the most famous spells throughout magic
Besides the 3 known swords to plowshares, opt, and demonic tutor what could the other reprints be?
Can't think of a ton of red card. I limited it to 3 per color and instants and sorceries only.
The cards have a rarity system within them with Demonic Tutor at mythic, Swords to Plowshares oddly at rare, and Opt at uncommon, again rather oddly. Rarity could be uncommon and up, like Dominaria legendaries. But I'd wager there will be one mythic in each color. These will be very flashy cards-- Force of Will is the easy blue choice, but Time Warp would make sense too. Natural Order would be my pick for green. Collected Company at rare. But I could see them choosing Berserk. Channel would annoy people. White could do Balance, or an upshift on Teferi's Protection. Ravages of War would be my pick, but they're too skittish. I dunno for red. Maybe Gamble, or something wacky like Jokulhaups or Wildfire. They just reprinted Past in Flames. Maybe something more recent like Bonfire of the Damned, or Star of Extinction.
I definitely wanna put my money on All is Dust. Seems like a natural choice.
There are a lot of great options, and probably the majority will be commons and uncommons that will have a nominal, predictable, and safe impact on limited, like Crop Rotation, Disenchant,Expedite, Doom Blade, Thrill of Possibility, and Prey Upon.
Low-power cube enthusiast!
My 1570 card cube (no longer updated)
My 415 Peasant+ Artifact and Enchantment Cube
Ever-Expanding "Just throw it in" cube.
(W/U)(B/R)GForm of Progenitus, Shape of a Scrubland
BRGJund Tokens with Prossh, the Magic Dragon Foil
URGAnimar, the RUG CleanerFoil
RRRFeldon of the Third Path 2.0 Foil
BG(B/G)Not Another Meren DeckFoil
UR(U/R)Mizzix, Y Control and X Burn Spells
(W/U)(B/R)GHarold Ramos - The 35 Foot Long Twinkie (In +1/+1 counters)
UB(U/B)Dragonlord Silumgar