"In conjunction with the technical aspects of WOTLK Classic Gold releasing a server that is older, Blizzard will also need to offer an extremely refined game that is accessible to their millions players. This is something that existing unofficial legacy servers can't provide," Viper wrote. You can see what technical work would need to be done over on the Nostalrius forums.
Viper concluded his post with a positive note in his post, stating the Blizzard is "now fully aware" of all the player...