If Lars Ulrich has anything to say about it, the band will begin writing music sometime in 2011. However, knowing the pace of Metallica, we likely won't see a new album until at least 2012 (if that).
Death Magnetic is surprisingly well written, so lets hope all these Big Four shows have reignited the flame and the band delivers at least one more album to remember them by. I haven't listened to Death Magnetic for awhile, so here's a refresher.
*Video removed, will try and put up a new one here shortly.