Wow, guys! Great work!
Nowtun, love the slig, man! Can't wait to see what you add. Sharpening up the tentacles and mask would be a good idea. As for the pipes, you may not have to include them, as they might just be a bother while animating, but I'll leave that up to you.
I would definitely flatten the mask a little bit near the top, as it looks like it sticks out too far from the front. The mask should look taut against the slig's noggin.
AG, the glukkon looks great!
The shape looks good, and I think the spacing between the eyes is fine. Despite the very broad brow, you still managed to a touch of sadness in his face, which I love. Being a pud, I wanted him to look a bit like a loser.
As for details, I want him to be a slightly younger glukkon, so don't go too crazy on the wrinkles. Just put them where it counts. Make sure his eyelids are nice and crisp, so they can accommodate blinking animation. When you add his ear flutes, don't make them too long, but make sure they have a nice "trumpet" shape.
For the back of his head, I wanted him to be reminiscent of the original Stephen Olds glukkon...
Notice the ridges and the little "polyps" near the bottom. It looks very much like the underside of a whale covered in barnacles.
Something like that. The more character you put in his face the better. When we're working with limited resources like this, it helps if the model is already as detailed as possible. We can cover up a lot with skins, but the less "painting" we have to do, the better.
Can't wait to see what else you guys have in store for me! I'll be revealing the nature of this short film soon.