Luden's Echo
From reading its description... I can't help but to think that Annie's ult-Tibber-stun is going to be broken beyond belief. Not only does her ult do AoE damages, this item also does AoE-damages, and applies all on-hits, basically, that bitch gonna be able to 1v5 whole entire teams by herself now (not that she couldn't already but it seriously gives me the feeling that Luden's Echo is just going to make Annie become an absolutely absurd perma-ban).
might be better. That being said, why not WAIT AND SEE BEFORE SPECULATING. You know..... test it before complaining about something that hasn't even happened yet?