Keep Circulating the Tapes: The ad was a viral ad on Youtube that had several million views. Chipotle eventually removed it, presumably because the accompanying game had also been removed, but it was later reuploaded by the animation studio behind the short.
Missing Episode: The Scarecrow mobile game has since been removed and can't be downloaded anymore.
The comic character
What Could Have Been: Coolio's brief cameo in Batman & Robin was meant to set up this character's appearance in a potential fifth movie in the series. However, thanks to the critical failure of the film, these plans were scrapped.