well of course it won't sound anything like those two...Not Alone is a demo from the M 2 M sessions, so it has nothing to do with the new album... New Divide though is a better clue because it has that electronic feel to it, which they've been talking about.But again, ND was made to fit the movie and not the new album (unless the new album has been really influenced by Transformers which I really doubt). From what I've heard so far I believe the new album is gonna be: electronics+beats+more rapping+poppy vocals +hopefully a bit heavier than M2M
EDIT: maybe hopefully a LOT heavier than M2M...we dont want 5 ballads again