The show was likely "cancelled" (for a lack of a better term), during at least S4.

[neatoman]

So the Rise art book doesn't quite state when Rise started development but the earliest dated concept art in the book goes back to july 2016, meaning the 2012 was planned to be replaced by it during season 4 at the earliest. Not much of a surprise really, season 5 has a weird "side season" label and there are only seven months between one show ending and the other starting. Still, it does mean the producers likely weren't that impressed with season 3 and/or how season 4 was going.