For all you Roblox players out there, they are apparently running another new world based on the "Mini World" brand of G5 toys. Those are the ones with the miniature figures in tiny play sets that we've seen them push occasionally the last few years.
So far only sponsored Youtubers have videos up for it, though I'm sure it will be available soon. Check it out below with them showing it off if you are curious.
Update: It's available over here.