I would love to see a tower defense type theme.

I absolutely love the very few flash ones available that have a sort of
basic army theme, or even some of the more creative ones floating around.

To my knowledge there are very few full blown tower defense games around
and anyone who creates one in one of these contests could take it much further
and sure beats going back to platformers and the like that are good but so overdone.

That's what I would like to see anyway