Ascended Fanon: At the beginning of the series, Pablo was just a normal (though often overpowered) character. When the programmers found out about his Memetic Badass status, they put a huge stained glass window of him in Backyard Skateboarding.
Cash Cow Franchise: This franchise was the cause of Humongous Entertainment making a profit.
Seemed to evolve further into this as soon as Atari hijacked the series.
Executive Meddling: A positive example - after Backyard Baseball didn't perform well in its first year, everyone at Humongous was convinced not to make any more games, but Ron Gilbert pushed them forward. And surprise surprise, they ended up outselling their already popular Junior Adventures.
Franchise Killer: With the major sports licenses lost and Sandlot Sluggers and Rookie Rush failing to Win Back the Crowd, it seems like the series may finally be over. The series was sold off to another company in 2013.
Magnum Opus Dissonance: Humongous had no intention of this series outselling their Junior Adventures, especially since Backyard Baseball performed poorly in its first year.
No Export for You/Bad Export for You: Backyard Soccer: MLS Edition was the only game in the series to ever be taken overseas. To make this even worse, they decided to translate the inferior PSX version instead of the PC version.
According to one of the original Humongous animators, Lara Schnieder, the series was going to go 3D, but before any game in the series could be produced, Humongous shut down and left Atari to continue it.
Basketball 's credits list the people who programmed an online mode, suggesting that it would have had online play. Football 2002 also has a screenshot in the help files that replaces "Network" with "On-line", suggesting it was supposed to be this instead of LAN.