The great idea of this AoS is that each person will choose a race (from twelve, currently) at the beginning of the map. The races all have different characteristics, which I'll spell out in a minute.
Once the person has chosen a race, that race's units will spawn from one of the spawning points and attack. There won't be any strictly east or west units. Rather, there will be a mixture of the types of units that each player on a team chooses.
So, in a three vs. three game, for example, Electromancer chooses Trolls, Lost Loch chooses Ogres, and Dead-Inside chooses High Elves. Each of their spawning points will spawn their respective units. Their opponents choose Trolls, Naga, and Naga. Each team is not limited by the races that another team chooses, and multiple players on a team can choose the same race (althought it might not be as interesting).
I've attached a picture of the production buildings and towers for each race. I'll add more information about the races and the layout of the map a little bit later.
Racial buildings, clockwise from top:
Dwarf Parthenon, High Elf Sphinx, Orc Command Pavilion, Troll Hut, Ogre Burgh, Undead Yggdrasil, Demon Aztlan, Night Elf Iglesia, Naga Patala, Human Outpost.
