http://www.wowhead.com/news=284240/m...-text-spoilers
Just some tidbits
"After Archimonde's fall, the orcs and draenei worked together to drive the Legion from Draenor. Those were good years."
"But without demons to fight, the draenei became fixated upon their precious Light."
"Their naaru masters compelled them to spread their influence among the orcs. A few converted willingly. Others had the Light forced upon them."
"Some orcs even sided with the draenei against their kin... even the warchief's own son was lost! We call these traitors Lightbound."
"I will not stand by while the High Exarch crusades against mag'har freedom! The tyranny of the Light must be ended!"