Captain Britain: Before Excalibur
Captain Britain was created by American Marvel Comics in 1976 for its U.K. branch. He enjoyed an erratic publishing history in Britain, with only occasional guest appearances in U.S. comics. Then his U.S. profile received a big bump in the late 1980s when he was made leader of the super team, Excalibur, which was one of innumerable spin-offs of the lucrative X-Men franchise.
Which then led to Marvel releasing this 1989 TPB collection of some of his earlier adventures, not previously seen in North America. However -- they didn't begin with his earliest tales (when he was significantly different in powers and costume). Yet neither did they release a collection of his middle adventures which were written by none other than Alan Moore -- by then already an industry super star thanks to the Watchmen, Swamp Thing, etc.