It appears to be a vykker-slig mix. Notice the blades in the tale thing, and also notice the pinchers on the face...very VERY vykkerish. but the pants, trademark leather, and pure ugliness say slig. Now, lets consider what we know of at the moment that could be a slig-vykker hibrid. OR a ugly-robopantsguy-with-dangerous-weapons-and-a-short-temper guy mixed with some genetic technology and the kind of special little additions that only the sick bastards at a certain flying laboratory could think up. THAT'S RIGHT! you have a big-bro slig. Ugly, lethal: the perfect mesh of danger and design

Meetle, Mug, ah, if the story could be changed as quick as it was, then you know that the guys at OWI didnt give a **** as to what the name was at the time. I doubt that they find so much importants in a protoype name anyway. I figure that meetle and/or mug were just good names for another idea that the guys had.
And as for it being a future queen...I doubt it. But i DO think that its attributes may carry over into the final look of skylla.
But on a side note, i would like to mention a lil idea i had the other day as to the glukkon queen thing picture. Sure, weve noticed her face's similarities to many sculpturesque things on oddworld (trains, pillars, buildings) and i think that OWI will probably keep the face that she has and probably even the body, but i find that her head, arms, and abdomin will be toned down to about the size of a glukkon's. WHY? you ask. well, first, we DO know what sam looks like from compiled pictures. She has the mudokon-sized head, arms, and abdomin, much like my description above. Second, how the hell are munch's lungs gonna be any substitute for the behemoth in the picture!?
I think that we can gather SOME information on the queens from all of the pictures that have been given out, but in all, these give us very lil of an idea of what the queens will actually look like.