not long ago, the developers of mega man maker published a post on their twitter account showing the new mechanics.
most likely they will work as simple Targets -- " "
but in the form of a boss.
if you go by the words of the developers that they were made and fixed for quite a long time then (according to my theory) they were made even earlier 1.8.0 or parallel to it.

Feeber will also be coming to the game soon - here's a post with he.

as you can see from the video, there will be several versions of the Feeber mob

with different colors and mechanics.

With a big bubble - everything is simple here, when he shoots his bubble you find yourself in it and it pulls you to the side where Feeber was standing (Feeber can blow large bubbles upwards)

With a small bubble - when he shoots them you can walk on them (small bubbles can go down the walls)

the conclusion is that the update will not be big and most likely no new blocks or bosses will be added.

that's all we know at the moment

(There was nothing new in Discord)

post: @YOLOP

so thank you to google translator for being able to convey the essence to you (even almost without mistakes)