Tomorrow the PTS universes are going to be updated to 9.0.0-beta5, which (to me at least) is the first public preview of the update.
April 26: Version 9.0.0-beta5 (PTS only)
There is no changelog yet, but with the previous major version updates, Gameforge has fundamentally changed the way OGame is played, either greatly improving or ruining it, depending on your view. The biggest example of this was the Discoverer Class, and the introduction of a brand new major source of income, completely out of balance with regular fleeters or miners.
So, with the new release coming out, what might we see? Nothing is too wacky of an idea.