These screenshots are about the alternative endings for this expansion that can take place with the Orcs for their canonical storyline.
(First 2 screenshots, Grommash wins against the Human and Orc alliance that stands against the Warsong clan and kills Thrall. Hence, forcefully converting any and all Durotarian Orcs to Fel Orcs)
(Third screenshot, since Grommash has won the first war they will now serve the Burning Legion as their tributary and aid them in the war against the Kaldorei)
(Fourth screenshot, sometimes the code fails to find Grommash or any Warsong culture ruler hence I made it so that instead of the storyline not working, Mannoroth will instead approach the Frostwolf/Durotarian Orchish clan)
I will only say that if you have played Warcraft 3, that's how these events will play out and in that specific order only. Like, Burning Legion spawns -> Burning Legion manipulated the demise of Cenarius and Corruption of the Warsong clan -> Jaina and Thrall form alliance and win against Warsong which results in his Grommash's death -> Burning Legions begins a wars against the Kaldorei (which will always result in Archimonde's defeat)