Sovereign's Bite and Lightning Strike provide a good example
While the last couple of sets focused on Planeswalkers, this expansion brings legendary Gods and enchantments into the game, which will shift the market focus onto the EDH Commander playerbase
Finally, the last item will be a scale, which is the most expensive and generally only has one use for most people
A year ago, in a Khans of Tarkir Standard dominated by many of the same decks (Jeskai, Abzan, UBx Control) and cards (Siege Rhino, Mantis Rider, Wingmate Roc), there were two decks that cost less than $115 (UW Heroic and Mono-Red Aggro) and only a single deck that cost more than $400 (Abzan Midrange)
Given both Lurrus and Yorion are influential thanks to the companion rule, and have been about equally prominent as a result, it would be weirder to talk about one without mentioning the other