Risk Legacy was probably the most innovative board game of 2011. It took the classic Risk gameplay that we all know and hate, and turned it on its head by adding a multi-game campaign, built in mini-expansions with prerequisites for opening, and the unheard-of idea of making permanent changes to the board and components, including their destruction. When it released, I played it and declared that those mechanics would be the next big thing in board games.
Designer Rob Daviau has since left Hasbro, started up his own company called Ironwall Games, and has been working a new intellectual property with legacy style mechanics. Today, Plaid Hat Games (which you may know as the publisher behind the recent BioShock Infinite: The Siege of Columbia) officially announced Daviau's new game, SeaFall.
SeaFall is described as a 4X strategy game set during the age of sea exploration. As with Risk Legacy, it will have mechanics in place to advance a story and remember player decisions from game to game. No more about the mechanics has been made public, but we can expect to learn more before it releases in 2014.
Rob Daviau Announces Next Legacy Game [Plaid Hat Games]