ImperialFighter said:

As far as your added 'horns' on this preview go, I think you could amend them a little, so that they are even better. What I think could improve them, is if you did the more rounded, more tapered, and more 'gnarly' ones that seem to start quite thickly, higher up on the sides of the Wampa's head

That's what I was going to say as well. The idea of adding the horns is fine. The problem is that this is a first pass, so maybe better elements could be found for the final horns. The ones in there now look way too smooth, too even and symmetrical to be natural.