Neal Adams daughter was drawn on the cover of HOM 186 (Pan Story).
He often submitted many ideas on his own.
Rejected covers for Phantom Stranger and HOM.
Also, check out this blog.
http://latimesblogs.latimes.com/herocomplex/neal_adams/
"When I stopped by, Mannarino had just paid $115,000 for a full 22-page story drawn by Adams and inked by the brilliant Berni Wrightson. Yes, you read that number right. "And someone has already offered me a $140,000 for it," Mannarino said, clearly torn about whether to part company so quickly with such a rare find.
"It's the only time Wrightson ever inked Adams, I believe," Mannarino said of the issue, "Green Lantern" No. 84, circa 1971. (The purchase did not include the cover, which is pictured above, but I love the work of Adams so much i thought I would share it with you.)"
Very cool, I'll have to pick this book up. I love these boards, always learning more.