Not sure why the confusion here. I figured it a given that this "eastern European empire" is not limited to only the technical borders of continental Europe - Hitler would gobble up a big ol chunk of Asia, eg to the A-A line.
Yes sure, but when it could actually make Germany stronger is a question though. Even if they could occupy that huge area it is a lot of time to colonize it and to make the economy work there. But as i told before i doubt the Allies had allowed Germany to do this, it would mean in a few generations time Germany will be a grave threat. Probably they had exported a lot of arms to the USSR to save them from defeat, maybe they even intervened directly eventually if things still went so horribly for the USSR.