There aren't too many staple cards for every deck, but much of last year I saw these pretty much everywhere:
SoG
AotL
TSC/NJ
CM
FA (either)
3 Woes
Dull LS
Lawless LS
Imitate LS
YWR
CoP
Ends
The Deceiver
Though this is bound to change somewhat, I don't foresee many of the FoM cards becoming cards that see play like the aforementioned cards have (aside from for sure Prosperity soul, probably Wages, and potentially Babel). Most of the FoM stuff that's exceptionally strong is tied to certain colors or themes (Covet LS, Deceit & Vengeance, Phinehas, Baal Worship, Leviathan, Sodom & Gomorrah, David's Census) or is situationally strong but inconsistent (Fall of Man, R&D, Vindicated LS, Confused Languages, Overtaken, Heart of Depravity, Life Through Christ) that won't work as staples on the level of something as good as The Deceiver or YWR. IMO this is very good (lessening the amount of "must have" cards) yet also bad (very few truly valuable cards to open if you're looking for things that fit into more than a handful of decks).