I’ve noticed in the “trending” section of Google Play, a game called “Icebreaker: A Viking Voyage”, developed by “PocketJam”.
This is not Rovio’s game, the title is pretty much a fake. Before Rovio has announced the new game, if you were searching on Google Play for “Icebreaker”, the “fake” game was entitled just “Icebreaker”.
My guess is that PocketJam saw the opportunity to make their game popular and they modified the game’s title into “Icebreaker: A Viking Voyage”.
Be aware not to get your hopes up.