Hey everyone, so who do you think will win? in a single combat? I will link about Blackmoore alternative timeline stuff since not everyone read the novel twilight of the aspects.
In an alternative timeline, Thrall died as an infant. Robbed of his ultimate weapon and most efficient method of taking over the Alliance, Blackmoore did the unexpected - instead of going further down his drunken path, he sobered up, conscripted mercenaries, and trained his would-be army himself. His hands-on approach won him popular support, and Blackmoore himself led the charge into Blackrock Spire. He even managed to kill Orgrim Doomhammer in single combat, dealing the Horde a devastating blow. Rather than having the defeated orcs put into internment camps, Blackmoore gave them a choice: join his private army or die. From wowpedia.
Garrosh Hellscream in mop without the last transformation of course just regular Garrosh. We can agree that he got stronger and more experienced since Wotlk, and the shattering novel.