From bands so long in the tooth you'd swear they were the newest enemies in The Order: 1886 to those who've had more ups and downs than a 50 Shades of Grey sex scene, 2015 is already hotting up as the year when many talented bands are dropping their latest works. It's a weird state of affairs when the categories for rock and metal tend to get associated more with the likes of Mumford & Sons or Coldplay than anything resembling music that could actually, like, keep you awake, but such has been the state of the industry for some time now. The internet is responsible for so many positive things - but in showcasing the diversity of sub-genres and the ability to get completely consumed by a band's work regardless of their cultural impact, it means anyone with the ability to look past the fake butt-implants and porn-filled music videos of dancing jackasses like Robin Thicke will find a niche all their own. Nothing wrong with that, but it does mean there's rarely any bands or albums that coral the masses into fever-pitch levels of excitement for what they're going to sound like. Enter this list, and every major rock and metal album finally arriving in 2015 you're going to listen to regardless of what anyone says - the stakes couldn't be higher, but all the same the talent behind each is sure to deliver something special regardless.