Context: Marvel held its own comic book convention, Marvelcon '75, in spring 1975, and promised a Marvelcon '76. At the 1975 event, Stan Lee used a Fantastic Four panel discussion to announce that Jack Kirby, the artist co-creator of most of Marvel's signature characters, was returning to Marvel after having left in 1970 to work for rival DC Comics. In October 1976, Marvel, which already licensed reprints in different countries, including the UK, created a superhero specifically for the British market. Captain Britain debuted exclusively in the UK, and later appeared in American comics.

Question: What was Marvel's self-hosted comic book convention called?
Answer: Marvelcon

Question: What artist's return to Marvel was announced at this event?
Answer: Jack Kirby

Question: What Marvel character was specifically created to appeal to the UK market?
Answer: Captain Britain

Question: When was the first Marvel-sponsored comics convention?
Answer: spring 1975

Question: When did Marvel's British-themed superhero first appear?
Answer: October 1976

Question: Who did Jack Kirby announce was returning to Marvel in 1975?
Answer: Unanswerable

Question: What marvel character was announced at the first Marvelcon?
Answer: Unanswerable

Question: What was DC Comic's 1975 convention called?
Answer: Unanswerable

Question: Who created most of DC's star characters?
Answer: Unanswerable

Question: When did Marvel become licensed to distribute in the UK? 
Answer: Unanswerable