Not sure where everyone got the idea Gecko was confirmed/next (@Sublime ?), but if they think it I'll trust them. It's not important enough to me to vet it.
The only color I know for certain that has been confirmed as coming is Earl, featured on a concept that was supposed to be at the EJS in 2020. At the time, FCA I think said it was a 2021 color, but who knows at this point.
I happen to think they have a gap in the palette most recently filled by Gobi, which is some kind of earthy/deserty tone. There has been a color (or 2 or 3) from that family offered on the JK and now JT platform continuously from 2013 or so on up until Gobi was discontinued. I'm waiting patiently, but this year is getting weird.