....
Given that the game sets up animosity between Ketheric, Gortash and Orin there could be content where you ally with one of them to dispose of the other 2, or have a situation where you simply dispose of 1 and then jointly control the Netherbrain, or have situation where you systematically betray all 3 of them.
You can do this. (well in a limited way.)
You can ally with Gortash. When you kill Orin, he will let you keep the 2 stones (takes some convincing), the one from Ketheric and the one from Orin, on condition that you join him to dominate the elder brain. You don't mess with the foundry of course, or liberate the duke and other prisoners with the U-boat.
However when you come to confront the brain, Gortash and your party ,the brain zaps Gortash first. So, you can retrieve his stone and then the emperor appears to pull you into the artefact. So you're back on the "normal" track.
