I would like to see 3 games tried out
1) A sci-fi hunter game. Think Kraven the Hunter(from spiderman) in space meets pokemon snap. You start off as a novice bounty hunter, working your way through smaller game challenges to learn the different weapons, traps, hunting tactics etc. Once you feel comfortable you start your career with multi-world, each with 2-3 environmentally styled continents to hunt game across. You can free roam, enter tournaments and take on request from corporations.
As you take more and more work for corporations (which will be the primary driving story line which you can choose to not do, much like skyrim) other you can start to play favourites or pit corps against each other for the price of the prize (example being corp A asks for a vicious bunny leech for $$ but corp B will give you $$$ because its for research). As you (the hunter) figure out how the corp's work you can earn more cash, and even contract up with corperations for "x amount of hunt contracts". However other hunters can/will come after you at the behest of competing corps (or corps you double crossed) Potential for "humanoid hunting" if you can find it, as well as "houses" which I would equate to guilds (eg: a forest rangers guild to catch poachers). For the purpose of "online" components, you can share your big game kills against a leaderboard/with friends. Also potential there for "group hunts" as a co-op multiplayer option
2) Mad scientist army builder. Think 1 part thief (stealth), 1 part Mass effet (Dialogue tree/persuasion skills), 1 part Civ (resource managment/distrobution), and 1 part Halo Wars (RTS combat). You are , a new member of a villans group called "The Genetic Cog". Your task is to slowly build an army of <robot/cyborgs/mutants/plant creatures/whatever> to take over (eventually) the WORLD!!. First you have to start in your own town.
As a mad scientist, you are on the watch list by the army and the government, so you have to be careful. So through stealth, guile (not the street fighter character) and subtlety you gather resources, assistants and test subjects (town folks) to build up your army. Once you have converted/grown/bred/built your legion of doom you move into an all out attack against the town (and larger establishments as you progress) battling against the millitary in the area and while trying to A) salvage more resource for the next stage (in the middle of combat) and B) keeping your minions alive.
Each successful area complete "taxes" your troops for the next level towards what I am calling "The greater evil" - aka a collection of villans monsters you get to use as part of the "final attack" (last area of the game). This is where "online" aspect would kick in. Your "taxed" monsters are able put into a pool which your friends (or anyone if you choose) have access to. You can trade and swap monsters. Bartering for supplies/resources will also occur here between area's. So if you and two friends are playing at the same time. you can trade him lets say 100 metal for 10 small robots or 5 medium robots or 1 large robot and such. I also think a competitive co-op mode would be fun here with scientists attacking a large very fortified city together (though still trying to be the better mad scientist).
3) Jade Empire II...... I mean come on, was a great game and with the abillity for mo-cap we could expand upon the martials arts available to make one hell of a game.