The series ended on an apparent cliffhanger with Wild Card's escape and return, indicating that a fourth season was planned. However, the season ultimately never materialized.
Season 2 began airing on Nicktoons November 30, 2012 at 9:00PM. The show resumed airing new episodes in July 2013. At that time, episodes also saw a same-week premiere on Saturday mornings on NFL Network.
For Season 3 they used CGI to animate the Rusherz instead of regular 2D animation.
Keep Circulating the Tapes: Needless to say, this show has not been well-preserved with only Season of the Guardians, the second season, being uploaded onto the NFL's official YouTube channel. The first season is more or less considered lost media, "Guardians Unleashed" did get a DVD release(Though it is now out of print) and most of the episodes are on Amazon Prime, though two are inexplicably missing(the two-part season premiere "Knights of the Sky" and "Troy's Comeback").
Banned Episode: As described below, during the third season, two episodes, "Web of Deceit" and "Troy's Comeback" did not re-air after their initial airings and were not available for purchase. Although no reason was officially given for their unavailability, it can be speculated that both episodes were pulled due to contemporaneous controversies involving the respective NFL player guest stars.