Advance Wars 2 for the DS has flown under the radar at the recently concluded E3 2007 but IGN was able to get some information regarding its release date:

In all the fuss surrounding Wii Fit and the incredible Super Mario Galaxy trailer, many people seem not to have noticed that tucked away on a nintendo europe release schedule is Advance Wars 2 for DS and it's coming out in Q4 2007.

That's literally all we know about it at the moment and Nintendo hasn't released any more information, screens or... anything in fact. Plus, this was a European release schedule, so we're not sure what that means for the States or Japan.