WAS and AAM have enough units that using shapeways other other models/cards like team poseidon that you can have whats fairly close to a complete game.
I saw your post sitting so long I registered to give you a few pointers on maps. Most if not all the WotC map packs are themed in some way. Originally they were 2" hexes but were changed some time ago. The map packs you mentioned are themed as follows: North Africa - 3 Desert maps and on reverse side 3 jungle maps. Eastern Front - 3 town/factory maps and on the reverse side 3 Russian steppes maps. There are two starters, the one in the cardboard box is the old one and contains 12mm mini’s and 2" hex maps. the new starter is in a blister pack and has 15mm mini’s and 3" hex maps. The maps in the new starter are mixed forest/hills/clear. The rules and revised cards are downloadable through the WotC site.
I’ve used reinforcements before, but mine were much more simple. My opponent and I would build our starting army, at say, 250 points. Then on let’s say, turn 3 or 4, we would deploy our reinforcements, valued at about 150 points.