It's always interesting to see something new from a company that's mainly built around one brand. Rovio made a lot of games, but most of them were Angry Birds related. I don't know if the formula doesn't work anymore, but the hype from the beginning is gone. It must hurt them to see that one guy conquered the world with a game (about a bird), without a huge marketing budget.
To find the next thing, Rovio set up a team called LVL11 to experiment with new games. The first outcome called RETRY has been released and when you start playing it, you might think of - exactly - Flappy Bird.