As seen http://www.fantasyflightgames.com/edge_news.asp?eidn=4848 The izardmen and Wood Elves previews have been released.
It looks like the Lizardmen might be really interesting, just from the couple of disks they have revealed they are extremely mobile, since both disks have that trait, and shoot at Medium range. Honestly at this point I am looking forward to the Lizardmen coming out as their own expansion if this theme keeps up.
The Wood Elves look like playing with them as your focused army will make Terrain have even more of an impact than it already does in game, and with the Dryad hero giving all wood elves a free flip will have a decent impact on the game in one form or another, and the Wardancers will be great for assassinations or for the first wound on Heroes.