http://www.gamesas.com/topic/1412992-orsinium-for-a-next-dlc-thread-2/page__fromsearch__1
This thread goes over the details.
Why was Orsinium moved to the Skyrim border?Why has Bethesda given us further insight into Orc culture? The wise woman of Dushnikh Yal and the
Code of Malacath both claim that Skyrim was home to Orcs long before Nords ever sat foot in Tamriel. Most of all, why did the developers give Malacath a set of unusually high stats? According to the game's files, he's set to level 100 with +1200 health. WAY higher than the other Princes. We don't get to meet him in-game, so why does he have combat-ready stats?
I think Bethesda has plans for an Orsinium/Ashpit expac...