I plan to start out with some very simple battle arenas in which you and three friends try to knock each other into various traps.
Then I hope to make a jenga like game.
Then I plan to make a "the riddler" level wherein as you progress you will be presented with riddles. Finding the correct answer will give you clues as to how to progress such as a hint to find the hidden key, route through a maze, object needed to set of a switch, etc.
+ many more. I have hundreds of ideas swirling around in my head. I have been gaming all my life and waiting for a game has never before been this painful.
side note: in order to make detailed plans I have to have my hands on the game as their is much still unknown.