I don't really see any new commanders that make me want to build a fresh, new deck but there are definitely things that will make their ways into existing decks:
Armored Skyhunter will likely find a home in my
Arahbo, Roar of the World deck.
Laboratory Drudge and Tormod, the Desecrated may both go into Grimgrin mill
Hullbreacher for Kess
Sengir, the Dark Baron for
Olivia Voldaren which is quickly becoming vampiric legendary tribal
Opposition Agent for Aminatou
Any number of the Mardu familiars could see use in Zurgo
Rograkh, Son of Rohgahh for Winota
Kodama of the East Tree for Xenagos
Anara, Wolvid Familiar for Ghired
Thalisse, Reverent Medium for
Teysa KarlovMay try out Elvish Doomsayer in The Haunt of Hightower
Plus any copies of Battlebond land cycle 2.0 will get snapped up pretty quickly.
And for reprints,
Three Visits likely to replace a more expensive ramp spell in multiple decks
I will find a home for
Nevinyrral, Urborg Tyrant, just not sure where yet. Probably Atraxa though [which may or may not also get Tevesh Szat, Doom of Fools]
I have to say, after all of the hype, at the moment, I'm fairly let down regarding this set. Unfairly, I really wanted more cards like
Ghost of Ramirez DePietro. While it's awesome finally getting cards for characters from way back that we've waited a very long time for, I was most excited for getting updates to a lot of the crappy old Legends from pre-Kamigawa block to make more playable cards.