Marc and I had a great game of Hordes of the Things the other day. My freshly painted dwarves managed to squash his flat goblins though we made a couple of mistakes with the rules.
While looking for something a little more complex than HotT, I came across Luke Ueda-Sarson's Middle-Earth Army Lists for DBM. He has done some great work on these lists and they should be adaptable for DBMM. Marc and I would like a little more magic without getting to the Warhammer level. - Stay Tuned
While poking around for more HotT information, I came across Alan Saunders wargaming page. A great resource for a number of games and periods, it features a set of quick play gladiatorial combat rules: Munera Sine Missione. So gladiators go into the pile of games to play (Nothing to do with Spartacus Blood and Sand featuring Lucy Lawless aka Xena in the all together).