While I'm not a fan of his work, I will be the first to admit that he has been really great to this community.
However, Bob chose the perfect word. Saturation. IMHO, Glenn doesn't need to illustrate every King related book from every publisher.
I personally look forward to seeing new illustrators that I am not familiar with.
Glenn has done more than enough SK titles. To be honest, so have Whelan, Chong, and any of the other multi-book illustrators that I may have missed.
I've actually been thinking about starting a thread for illustrators we'd like to see working with CD, SP, PS, Centipede, etc.