Anduin Wrynn is Indeed the Next Hero Coming to the Heroes of the Storm Nexus
The Heroes of the Storm PTR has been updated with the newest hero, Anduin Wrynn, coming to the Nexus. Anduin "has come to the Nexus to take his place by his father's side" and is a ranged healer. According to the patch notes, he brings a several abilities designed to keep his companions healthy as well as "the potential to unleash the Light's swift justice to enemies on the battlefield".
Two of Anduin's basic abilities, Flash Heal and Divine Star, heal, though the latter can also damage as he hurls a path of light. His third basic ability, Chastise, deals damage and roots enemies.
At level 10, Anduin's first Heroic Ability is Word of Salvation that is a mass heal for damaged companions that are nearby. His second Heroic Ability is Lightbomb that "imbues an Allied Hero with the Light" that after a short time explodes and deals damage while stunning any enemies nearby.
Anduin's Battle for Azeroth mount, Reverence, is part of the in-game shop as are a number of new skins for both Anduin and Varian.
Read the full update notes on the Heroes of the Storm site.