Marvel is the king of the event comic. Marvel created event miniseries in the early '80s with Marvel Superheroes: The Contest of Champions. Secret Wars (1984) was the first recognizable event, and since then Marvel has put out more event comics than anyone else. From summer crossovers to the event book, Marvel has made event storytelling a huge part of their publishing slate every year, putting out more and more event comics every year.
Source：https://www.cbr.com/great-marvel-events-too-many-tie-ins/
