This came to me from John Parkinson…
I've tried to ask this question before but maybe it didn't get to you or you're not interested, but I'm dumb enough to keep trying.
When Jack Kirby returned to Marvel he didn't pick up books (with the exception of Captain America) he was once most identified with. He did do covers for those books though. So was he never offered say Fantastic Four or was he simply not interested in revisiting those characters?
If Jack had been allowed to do whatever he wanted then — this is when he came back in 1975 — he would have written, penciled and edited all-new books which did not crossover into other comics and he would have avoided characters that were under the creative control of others. He basically wanted to be left alone. A lot of this had to do with his experiences doing Jimmy Olsen for DC. The editorial office there was constantly criticizing the way he handled the established characters…and even one he created (Morgan Edge) once that character began appearing in other books.
Jack understood the power of the "Marvel Universe" concept having been a key architect of it. He just felt that he could make his strongest contribution at that moment by going to new places with new players, plus he also felt a lack of respect from some of the people he had to deal with on the Marvel editorial crew at the time. The less he had to engage with them, the better off he felt he would be.
Mostly to be a good sport/team player, he agreed to take on Captain America and, later on, The Black Panther. Those were not his choices but that's where Marvel — mainly Stan in this case — wanted him. Also, Jack did not want to displace anyone from their regular assignments. At the time, Captain America had no regular creative team assigned and later when he took on Black Panther, it was because Stan wanted to launch a new series in a new direction. So Jack wasn't bumping anyone off a job there either. He would have had he taken on Fantastic Four or Thor…and as I said, he really wanted to be left alone to do new books.