It's unlikely that Blizzard plans

The latest Diablo 4 cinematic trailer from Blizzard features Inarius facing down Lilith and armies on both of their backs. While this scene lacks Tyrael's direct involvement buy Diablo 4 Gold, the design of the Horadrim and involvement with the various Paladins of Sanctuary ensures that he's at work. Light and dark clash across the field, and the now-mortal Tyrael is somewhere in between.

His presence will be felt through these intermediaries unless circumstances require his intervention. Tyrael is still feeling the effects of the destruction of his Worldstone at the conclusion of Diablo 2. This mystical object protected Sanctuary from Heaven and Hell, and he now serves as the protector of the land as its successor. Tyrael appears unlikely to lead any further adventures into Hell or go much farther beyond his current position at the Pandemonium Fortress, where he could offer advice as Deckard Cain for those who are willing to listen.

Five playable Diablo classes were announced to date each of which different versions of the previous games. In the sense that each game has been different it is possible that Tyrael can be an important player in the fight that balances the sides, providing players with the possibility to take on angelic or demon-like powers in exchange for duties to Sanctuary. This kind of strategy could easily follow on the multi-tree progression that was in the game.

It's unlikely that Blizzard plans to create Angels and Demons into classes, since the series focuses on characters stuck between them. However, as a mortal stuck between Heaven and Hell Tyrael is in an unusual position in the entire Diablo lore. He's more likely to play an equalizer in the story, maybe even the voice of reason instead of taking sides as the past. Even if he's forced to choose sides, Tyrael knows the value of mortals, and that's how he will cheap Diablo 4 Gold most likely take part in the events of Diablo 4.