Well, if someone had told Chris that old wives tail about eating a bunch of fruit to enhance the flavor of your baby gravy, we wouldn't have gotten the Tomgirl monstrosity we see before us.
No, this was set to premiere on Nick, but it kept getting delayed. Murray had expressed that it was completed about over a year ago, but I'm sure Nick didn't want to go that far left. The tranny story was probably included since the special's inception, and some idiot, liberal exec approved it to premiere in front of a bunch of kids. The higher ups probably shot it down or cancelled it outright until Netflix came knocking. Nick was probably afraid that Zim wouldn't mesh with the demographic, so they decided to give it to Netflix too.