I'd venture to say that there will be a very minimal weight penalty, if any, at all, given that the brakes on the current Madone are pretty hefty. I, for one, am pretty happy the bike will be more evolutionary than revolutionary. I think the current model was such a big step from anything that Trek had done, short of the SpeedConcept, that there wasn't much that could be done to make the current bike more aero. Plus, disc brakes are the new hot area, so leave the established frame, as-is, and just focus on incorporating disc brakes into it. Unfortunately, they didn't post any other photos with the bike in it, so I can't judge what the front will look like, but anything less than fully integrated brake lines will be a disappointment (my one gripe with the Domane/Emonda/Boone/Crockett disc brake setup).