Here’s my crazy fan theory. The creature is a body snatcher. The real Will died 14 years ago and IT has been wearing him as meat suit since then. That means that Jemma got jiggy with IT. Episode 8 showed Lash packaged for shipping into the portal. I think they’ll find Wills desiccated body on the planet and be faced…

There are two others that I think could fit:
Sublime: http://marvel.com/universe/Subli…
Shadow King: http://marvel.com/universe/Shado…

It’s because these and Bernie’s Frankenstein both emulate the old wood gravure techniques. Look up Gustave Dore for classic examples of this technique.