The Heroes of the Lance, after Xak Tsaroth, appear statted out in Sovereign Press' War of the Lance hardcover released last year at Gencon (an excellent book by the way).
The versions which will appear in the forthcoming module Dragons of Autumn, will be those characters as Dragons of Aumtum (ie.DL1) begins, not after Xak Tsaroth.
There is going to be complaining either way over this, but I don't have any doubt that Jamie Chambers is going to include them. He's already said he will.
My one concern is the stated intention of Sovereign Press to include material in the Silver Anniversary edition of DragonLance in the new 3.5 versions of the modules.
The only reasons they would do this is to make it easier for the novels to be re-created. That was what the Silver Anniversary version of the modules brought to the table.
I think this is tragically wrong headed and the certain, exact and precisely WRONG way to run a classic War of the Lance campaign. But, there are a lot of DragonLance fans who are all about the novels. They were novel fans first, gamers second, and they want this - so it's what they are going to get.