I discovered this right now. It seems that Cubecraft is working on a new mode for UHC: "Speed UHC".
How do I know that? Easy
Go to "challenge menu">"achievements">"UHC"
New mode confirmed ;)
Um weve known about uhc if you had been to the community stream about 4 weeks ago or so you would know
1. Uhc is trying to be rushed out by the years end
2. Theres normal AND speed uhc
They litterally layed out just about everything
We also know that after uhc theres an update to creative and after that skyblock arrives