Moriarty1975 posted on our forums two images showing that new Modern Warfare 3 emblems have been added to the Clan Level Unlocks section on Elite.
The new emblems will be unlocked as your clan earns more XP, see images below. It’s still unknown when the emblems will go live in-game, but they should be unlocked retrospectively.
Here is the last emblem, the Evil Samurai, which unlocks at level 50.