why WoW??

Recently...i heared a rumour...something like Blizzard is upgrading Wow...but not just a litlle upgrade a big one.You can go up to lvl 80,new class Death knight(some kind of paladin conversion),a new continent Northrend(like Outland but it is situated between Kalimdor and Eastern Kingdoms),Destructible buildings,siege weapons(something like tanks and mortar teams i think),new profession: inscription,changeable hairstyles( that seems funny),new dances(really funny),new quests of course,new dungeons,new monsters,new items,and the surprising new boss Lich King,but all this things make me wonder.As we all know Wow is a extenssion of Warcraft frozen throne,If we know the history well we can "predict" future upgrades.Death knight- the paladin is consumed by scourge monsters and he transforms,like in Frozen Throne,Arthas becamed from pally that death knight,but where is Arthas in all this thing,why is he hidden,maybe Lich king is not the final boss.And as we all Frozen throne players know,Arthas had a big sword,maybe future 2 handed,Frostmourne(this sword consumed his soul and he becamed Death knight),this shoud be interesting to see.But let's not "predict" and just wait for the new patch,View Trailer Lich king on movies Gallery.