A new portal/rift appeared in the sky yesterday following the return of the floating island to the center of Leaky Lake. According to lavamanthegreat_ over on reddit, it is expected to go through six different stages, though what each entails is currently unknown.
Events/changes usually take place at 4pm ET/9pm BST on any given day, hop into a Playground match around this time if you're interested in seeing what happens.
All of these events are getting difficult to keep up with, are you still following the cube and island? If so, what do you expect to happen next?