Vorinclex is definitely a very powerful card, which could be utilized well alongside other cards like planeswalkers. But at 6 Mana it's a bit too expensive even with such powerful abilities.
It's basically a Doubling Season on a stick, but you don't see that card in anything except commander format. However, Doubling Season still holds $40 price, so why wouldn't Vorinclex be able to sustain a similar price?
If it shows good results in standard and proves to be a great finisher in such decks like Gruul Adventures or Mono-Green Stompy, then it will likely preserve the current price tag.
Those are the most expensive cards in Kaldheim. For more Magic: The Gathering content, card lists, and guides, head over to our MtG hub page here.