Here is the preview:

http://www.gamespot.com/pc/strategy/...6105481-2.html

Interestingly, Blind Kings list of historical battle mentions at least some 21 or so battles, but apparently they reduced it to 10 here is the quote directly from the preview:

In addition to the campaign game, Rome: Total War will ship with at least 10 historical battles. We've known about the Battle of Teutoburg Forest for a long time, but some of the new battles that we've learned of include the Siege of Gergovia, the Battle of the River Trebia, and the Battle of Telamon. If you're an ancient history fan, then some of these should certainly pique your interest. And, of course, Rome: Total War still has a robust multiplayer mode that will let you and your friends battle it out with thousands of units.
And btw there is no mention of the historical campaign from MTW, i always thought that was a nice addition...but anyways. enjoy the preview.