In a thread begging for Riot's response on the current state of the Twisted Treeline, RiotNometeased out that something cool is coming for TTL and Dominion.
"We're focused on Howling Abyss right now (lots of work remaining before we're ready to ship), but there's something very cool in the works that should please both Twisted Treeline and Dominion players soon."
What could it be? New items / Balance changes? Ranked Queues? Let me hear your ideas!