This thread is a great idea!
@Remington: "Teeth and Claws" sounds awesome!
I can see a lot of cool bloodthirsty monsters.
@Edrice: "Fantasy pilots, robots, and aliens is always good"
Yeah, I second that. This could be combined with hardsurface modeling as Remington suggested.
Regarding "Fight scenes, any two characters fighting" -- well.. that sounds great but I think a lot of people only have 2-3 hours (if at all) for modeling in the evening before they have to go to bed. It would be hard for them to model two characters in 4 weeks.
Regarding "Taking an old 2d concept, and having a fresh take on it in 3d" and
"Redesign a famous character(ie sherlock holmes, batman, robin hood)" -- that`s an interesting idea for sure, but if there`ll be public voting from now on, you should keep in mind that some members might vote for their favorite character just because of the character itself and not because of the modeling.
The person who has choosen (for example) Batman or Hulk might get more votes than the person who has chosen a more unknown character.
Regarding "Make the most badass character and pose you can possibly come up with"
That sounds challenging and it also sounds like a lot of fun

.
I think the topic should be clearer, though.
It`s hard to judge if the participants can create whatever they want.
How to compare a princess with a monster? ... That`s impossible, IMO. But I like the idea of the pose. Action please!
I don`t have any good ideas for a topic at the moment but I for one would love to see own character creations and a nice base this time.