This is by no means official, but I thought I'd pass along some comments from players having some fun on the Test server. One player, Mykia, has discovered a number of new enchants.
(Ahn'Q 20man Drop) Enchant Gloves-Shadow Power: +20 shadow dmg
3x Nexus Crystal | 10x Large Brilliant Shards | 6x Essence of Undeath
(Ahn'Q 20man Drop)Enchant Gloves-Superior Agility: +15agi
3x Nexus Crystals | 8x Large Brilliant Shards | 4x Essence of Air
???(Unknown)Enchant Gloves-Frost Power: +20 frost dmg
3x Nexus Crystal | 10x Large Brilliant Shards | 6x Essence of Water