Er, okay. That seems unrelated since they never "made Quake" and likely have little/no influence over Carmack himself.

But oh man: Carmack vs Notch. Imagine it.

Nevermind, I hope Bethesda can somehow persuade/pressure/bribe/extort Carmack into that. Because... C'mon. Carmack vs Notch.

Both Bethesda and id are subsidiaries of Zenimax[1].

[1] http://en.wikipedia.org/wiki/Zenimax