I spent about ten minutes laughing at the Ghost Rider cover in particular. Monkey Ghost Rider is probably the best idea (as in, "I will buy every issue of the series if Marvel publishes it"), but Robot Ghost Rider got the prize for detail.
Callen, turns out, has a blog with other stuff.
http://kerrycallen.blogspot.com/Lots of good stuff, though, absolutely, the world needs more of these Marvel characters.
