As much as i wanted to i didn't get any of the End Times books i knew that i would struggle with he majority of the the fluff because i only really know 2 army's fluff history: Skaven and the Ogres. Now saying that i know their fluff really means i just enough to get me by without knowing all the tiny details. So as for knowing whats going on with the End Times i listen to the Garage Hammer and Heelan Hammer End Times reviews (great reviews check em out) but there only just finished the Khaine reviews. So being curious about what happened to the Ogres since they had got little to no mention so far i looked it up and found
this page. (If anything is wrong make sure to let me know) The page pretty much covers the whole End Times story in good detail and each army has its own section. The Ogres have a tiny part in the middle of the fluff section, its not much but it tells what they got up to.
And what did they get up to? One thing is they joined up with this bad ass!