computerguy72 :
Zenimax should be destroyed over this. I'm not an Oculus fan but that doesn't matter here. Zenimax is in effect suing over ideas they did not plan to use in any way
True. They're clearly being an IP troll, here. There's no way they would have done what Oculus did, and therefore there's no way they suffered such damages. But, they're operating with in the (twisted) law, so there's no recourse but for Oculus to appeal or counter-sue.
computerguy72 :
They claim that off-hire work-product by an employee (Carmack) is owned by the company
I'm pretty sure they not only knew he was working on VR, but that he was doing some of it on-the-clock and using company resources. That makes the IP in question theirs.
The mistake was for Luckey not to buy out the rights to Carmack's IP, when he left to go to Oculus. And before the acquisition, Facebook should've covered this in their due diligence. They probably could've even financed a settlement to this, through a special round of funding, prior to the actual acquisition.