A Neal Adams poster done of Byrne's DOOMSDAY PLUS ONE characters.
In THE ART OF JOHN BYRNE book published in 1980, Byrne passed on a story told to him by an editor at Charleton, where Neal Adams visited the Charleton offices, and the editor showed Adams some of Byrne's pages for DOOMSDAY PLUS ONE.
After looking at them Adams responded: "They're very good. What can he do?"

Observing the obvious amount of Neal Adams influence in Byrne's art.

It reminds me of a COMICS JOURNAL cartoon of Neal Adams at the IRS office, with the IRS agent telling Adams he would be fully justified claiming Rich Buckler as a dependent.

The above Adams pin-up was later used as a cover for an issue of Fantagraphics' 1986 reprint of DOOMSDAY PLUS ONE, reprinted as DOOMSDAY SQUAD.