Even Daxxarri got into the mix, looking to bring in the Snarks from the Half-Life series and draenei-crewed Battlecruisers appearing over the skies of Kalimdor. Oddly fitting, really. Personally, I would have gone with some of the ork creations from the Warhammer series, since I could see orcish and goblin technology coming together to create such monstrosities.
Which items would you bring in from other games? What magical artifact or ancient relic from some distance universe would you want your WoW character to possess? (Thanks again to Shadowcog for an awesome post!)