Why did Seth MacFarlane make Famly Guy?

Answer 1

FOX originally wanted him to make animated shorts based on his "The Life of Larry" & "Larry and Steve" Cartoons that were to air between skits on MadTV.

However instead of that they hired him to create a half hour show so he retooled his "Larry" characters into the Griffins.

Answer 2

He didn't. FOX decided to put a moratorium on both shows making references to each other. Homer Simpson does make an appearance in The Juice Is Loose.

However, the events of the episode took place in 2007, before FOX's decision.

Answer 3

Matt didn't create The Simpsons Movie, in fact he has very little to do with its creation.

Answer 4

Seth was hired by FOX to make Family Guy be animatedvignettesto air between sketches on MADTV, but FOX decided to make a series instead.