Britsfan makes an excellent recommendation for a set of U.S. Cavalry fighting on foot.
I would like to see it sculpted to be able to use as dismounted skirmishing line and hand-to-hand fighting and using both carbines and pistols, with one horse holder and one falling casualty. Produced in Mid-Blue color matching it's Mounted Cavalry and ACW sets and it would be nice to see it fit in so it could be used for both Indian Wars and the American Civil War. S*R's current exciting sculpting and it could serve many uses in many battles and wars.
The Waterloo set poses will be mostly on the ground and covering the last moments of the Last Stand, plus if like all other sets will be in a cream color hard plastic limited to a diorama specific scene.
So I vote for a more Generic Dismounted Cavalry Set that can be mixed with the other great Cavalry and ACW Sets Strelets has already made to help fill out the gaps still needing to be filled.
Massimo Costa's set will be in white metal and out about March of this year and a very limited edition. 20 figures, 3 dead horses and several separate weapons for about 30-35 euros and shipping extra. His email@example.com e mail address should get through to him. W1815 set will be a reduced version as stated. He has just written to me with pics.