When they finally figure out how to make Atomos to not look like a giant A-hole, then we may be able to summon the new avatars. In the meantime, they are still having tons of meetings to figure out how big or how small or how puckered up the size is. Oh and probably also trying to solve problems on how many meows Caith Sith will wail before it starts attacking and scratching the enemies to shreds... I tell you, big decisions have to be ruminated among the team members.