Written by Blake J. Harris, "John Madden Hockey: How a Lousy Football Game Birthed a Bastard and Led to the Greatest Hockey Game of All-Time" appeared on Read Only Memory:
"After NHL Hockey was finished, the company quickly got to work on a follow-up to John Madden Football. Its working title, John Madden Football 2, might not sound risqué to modern ears. But in 1992, it caused a significant question to ring through the halls of EA; a question whose answer, at the time, was by no means assured:
‘Will people actually buy the same game a year later?’" Full article.