Five playable Diablo classes have been buy diablo II resurrected items released so far and they all offer different versions of the previous games. Given each installment so far has been different The possibility is that Tyrael may become a player in the war that balances the sides, offering players the ability to be transformed into angels or demonic powers in exchange for obligations to Sanctuary. This sort of mechanism is likely to be similar to the multi-tree advancement already revealed for the series.

It is unlikely that Blizzard plans to create Angels or Demons into classes, as the franchise centers those who are caught between the two. However, as a mortal trapped between Heaven and Hell, Tyrael sits in an unusual position in the entire Diablo the lore. He is more likely to be acting as a balancer in the story, or even as a voice of reason instead of taking sides like he once did. When he's forced into taking sides, Tyrael is now aware of the importance of mortals. That is what he'll be doing to take part in the events of Diablo 4.

Blizzard's method of speccing your character's characteristics in Diablo 4 is a blend of the game's approach to Diablo 2 and Diablo 3. The executive producer and director of the Diablo franchise Rod Fergusson put it, "Diablo 2 seemed like you were locked in; you had the ability to respec one time per difficulty. But with D3 you kind of changed your build like you changed your clothes. Everything was gear-based as opposed to skill-based."Fergusson added, "I think the fact that we have skills on the equipment [in Diablo 4] is really nice for experimentation -- as a sorceress I [might] get Blizzard [on a pair of boots] three levels cheap D2R Ladder Items before I should and I can try Blizzard to see if I actually want it."