Reply To: New legendary set items teaser?

Rovio has pretty much confirmed that the latest tweets are teasers for what will come in a future update:

There'll be lots of new epicness coming up! We'll be sharing what we're working on, right here! Did you see this yet? pic.twitter.com/1XizLlSHRN

— Angry Birds Epic (@ABepic) July 13, 2015