The official Kirby Twitter account has been publishing mysterious messages recently which are related to Kirby Star Allies which is available now on the Nintendo Switch. The first two tweets (which are in Japanese) mentioned opening a hole through time and space. The third tweet is related to a book passage which says the following:
This was something written in a certain book that still hasn’t been completely deciphered, but perhaps the vessel of our Lord may have come through a certain passage from a different world…
That space surrounding the passage was once called this:
As Siliconera points out Another Dimension is the last level in the classic Kirby’s Return to Dream Land. The publication speculates that Magalor will presumably have something to do with the update possibly as one of the Dream Friend’s or it could be bigger than that. We shall have to wait patiently for Nintendo to spill the beans.
“One interesting thing to note is that a mysterious book is meant to have contained this information. In Kirby’s Return to Dream Land, cutscenes were stylized to have taken place inside a storybook, which could be related as well.”