Dataminers have been hard at work combing through the Mists of Pandaria
beta client that became available tonight. The new enchants coming for weapons and armor have names -- and here they are, courtesy of WoWDB
Enchant Weapon - Pandamonium Permanently enchant a melee weapon to sometimes grant 1,000 attack power for 12 seconds. Can only enchant a level 92 weapon.
Enchant Weapon - Windsong Permanently enchants a melee weapon to sometimes increase your critical strike, haste, or mastery rating by 1,500 for 12 seconds when dealing damage with spells and melee attacks. Requires a level 384 or higher item.
Enchant Weapon - Jade Spirit Permanently enchants a melee weapon to sometimes increase your intellect by 1,650 when healing or dealing damage with spells. If less than 25% of your mana remains when the effect is triggered, your spirit will also increase by 750. Requires a level 384 or higher item.