The Heroes of the Storm team has unleashed a new developer blog that compliments a pair of videos released late last month that show off the new traits and abilities soon coming to both Raynor and Azmodan. Each will have a trio of new talents that should dramatically alter their gameplay. They'll be coming to the Nexus in July.
Read the blog post on the HOTS site.
Azmodan
One of Diablo 3's Prime Evils will become even more evil with the rework. At level 16, Sin's Grasp shortens the cooldown of All Shall Burn IF it goes to its full duration. In addition, if the channel is completed, Master of Destruction provides an AoE explosion. At level 20, Azmo will receive a brand new talent, Trample, that, as the name implies, will allow him to jet forward a short distance to deal damage and slow all in his path.
Raynor
Raynor, everyone's (possible) favorite Starcraft Terran, will receive a new Level 7 talent that reduces Adrenaline Rush while he uses basic attacks while Inspire is active. In addition, he'll also see a new level 13 talent called Rallying Cry that affects all teammates in its range to increase damage output by boosting attack and movement. At level 16, Bounty Hunter "activates" Rallying Cry to "deal bonus damage based on the target's max HP" and gives him some armor.