The Heroes of the Storm PTR has been updated with the latest build that includes a new hero, Zarya from Overwatch as well as a new Starcraft-themed battleground called Warhead Junction. Chen and Nazeebo have been spiffed up both visually and in Talent overhauls. Other characters have had a bit of fine-tuning applied as well.
Aleksandra Zaryanova is one of the world's strongest women and was a promising athlete, but all that changed when the Siberian omnium reawakened. As a soldier in the Russian Defense Force, she now proudly uses her strength to protect the ones she loves.
Check out the full PTR update notes on the Heroes of the Storm site.