This game is stuck in the development limbo known as Vaporware. Few to no details have been released about about its gameplay, plot, or release date since its announcement many years ago. It may or may not be in active development, but neither has it been cancelled officially.
Beyond Good & Evil 2 will be in continuity with the first game, with a big variety of levels, lots of emotion in the gameplay, and characters we care about. This time we are dealing with planet's future, and the relationship with the animals.