When Blizzard originally announced Garrosh Hellscream as the next Heroes of the Storm character I envisioned him as a bloodthirsty brute, constantly on the offensive and never backing down no matter how dire things may appear. The Garrosh Hellscream we'll be getting, however, is much different... and sadly, much more boring.
If you're wondering what exactly I'm blabbering about, allow me to share with you the recently posted spotlight video. It'll give you a pretty good idea of what Garrosh is capable of and why I consider him to be so bland despite his World of Warcraft variant being quite flavorful. Have a look:
I don't really mind him being a tank as Heroes of the Storm sure could use more of those, but could Blizzard have possibly designed a less interesting skill set? Garrosh was empowered by an Old God at one point, he had powers beyond imagining, and yet none of this is present in Heroes of the Storm. His abilities are good enough that he'll most likely find a spot on some sort of team composition, but this is definitely wasted potential as Garrosh could've been something truly special.
As for when exactly Garrosh will arrive, I'm afraid nothing has been revealed just yet, though given the presence of this video I would imagine he'll be here in the next few weeks. If you would like to keep yourself up to date I would recommend visiting the official website, but just keep in mind that there isn't anything about Garrosh just yet.