I believe Didio was working on a cartoon, aptly named 'Reboot'.
For Lee...
It's a combination of several things...
1. the removal of Chris Claremont from X-Men (displays his determination in climbing up)
2. the rallying of Marvel's hot artists to up and quit and form Image (displays his influence over others)
3. DC wanted Wildstorm
4. Jim Lee's art sells and DC needed a high profile artist to pull $
5. Bob Harras (buddy from Marvel)