So, eh... Anyone have some theories as to what this creature from Multiversity #1 might be?:
It was noticed by the heroes and then immediately put on the backburner when they transported to Earth-8.
I initially thought because of its multi-dimensional nature(it was existing in a few universes simultaneously there) that it might be the 'leader' of the Gentry. Then I thought it might have been a different iteration of Hellmachine, as a few of its tendrils can be seen [presumably] encroaching on the 'House of Heroes' universe:
http://i.imgur.com/MksPIje.png
And it was Hellmachine who ultimately destroyed the HoH during the Guidebook:
http://i.imgur.com/mb6fbIR.jpg
srug
Heck, I even went all the way back to Morrison's run on Batman RIP, wherein every time Bat-Mite appeared to Bruce, a green-skinned creature of unrevealed origin can be seen clinging to his back:
http://i.imgur.com/BuF7Xd5.png
http://i.imgur.com/TCBsmOi.png
Perhaps that was the creature in its infancy, and Multiversity depicted the same creature in adulthood..?
It's a huge stretch, I know, but this was the same story in which Morrison gave us this epic line:
Batman: "Are you really an alien Hyper-Imp from the 5th Dimension... Or are you just a figment of my imagination?"
Bat-Mite: "Imagination is the 5th Dimension."
http://i.imgur.com/ZmMzN66.jpg
...And thought-powered/imagination-fueled concepts are obviously a big component of Multiversity.
srugx2
Regardless, that creature has got to be significant.