Hey! I like the Werewolf base character! Looks awesome so go with it
About hair, how about just make his hair CUT shorter a little? I'll explain a bit more if you couldn't understand.. The point is it will be thrilling for everyone to to look at how all the characters are grown up and have a sense of fashion or something :P
Like the teen Dennis wanted long hair coz he thought it looks cool but as he got a little older, he's like 'fk this..too hard to maintain, I'll go with shorter hair' lol.
You know we all have been very creative with the story and how the characters are going, this is already going to be pretty grand so a little more small things will make it THAT good. (I think)
Hope you get my point and don't think I'm being a little overzealous with the 'changes' on old characters.
EDIT :
Didn't shade and shiit coz didn't have time and used Paint lol.. also don't mind the dirty pixels around.
The beard looks a fail tho, but I think hair looks good?
Thoughts?
EDIT 2 :
HOLY CRAP! Now that he's zoomed out in my screen, he's hard to recognize as Dennis.. hair DOES make a difference eh...