If I could get him anything, it would be 60 minutes of network airtime per week. He can fill it with whatever he wants.
That would be pretty great, even if he decided to fill it with random stuff every week. I know I'd be right there watching "Joss Whedon Presents Polar Bears on Unicycles Across a Tightrope" if that was what he picked. Actually, that sounds kinda cool already, he'd probably add some twist like the lead polar bear dies and comes back as a demon cyborg to fight River Tam.