There's an Ender's Game movie burning somewhere on the seventh level of Development Hell, which if it ever comes to fruition almost guarantees the eventual existence of Ender's Video Game. This may not suck, but it probably will, so before it does, I'm positing my vague ideas for what it could have will have been (that's present-future-imperfect-subjunctive-aorist tense, in case you're wondering -- only time travelers and prognosticators use it)

Really this would be a sports game, with a wild field and weird rules. I'm being reminded of HyperBlade even as I type. This is a woefully underpopulated genre , and most of those are cosmetic re-imaginings of modern sports anyway. Perhaps this is because developers don't think gamers are interested in learning new rules. They may have a point.

For instance, the rules of the "sport" of FPS are pretty similar across the board:
1) Shoot
2) Don't get shot (or kicked by a goat)

That could be Halo 1, Gears of War 2, or Super Noah's Ark 3D. The cosmetic differences are greater than any others. Noah's Ark was a Bible game anyway, so "the Covenant" and even "the Locust" wouldn't be out of place. (Gnats? Frogs? Darkness? Screw those sissy plagues. I bet Pharaoh would've let the Jews go pretty damn quick at freakin' gunpoint.)

That's why we need the tie-in. Not to free the Hebrews, but to get people onboard with a new set of rules. Ender's Video Game would be the perfect property to create a fully fleshed-out microgravity FPS/sports sim. The heart of the game would be based on the space combat training exercises the children carry out in the micrograv environment at the center of the rotating-space-station-cum-orbital-West-Point they call home. They're issued what are basically laser-tag guns, and special suits that react to being shot by said guns by immobilizing the portion of the body that got hit. The playing "field" was a large ellipsoid arena that would, at different times have big inert objects called "stars" floating in it for cover. The object is to get a small object (or person) into the enemy's "Gate" -- the portal through which the entered the arena -- which is at the opposite end of the space from yours. I'm doing all this from memory, so it is certainly wrong in many places, but you get the idea.

A game that worked on a vaguely similar principle but with constant thrust instead of environmentally limited thrust was Rocket Jockey So play that (or it's open source equivalent) to get an idea of what I'm talking about.

Instead of thrusting around with jets or rockets like a space fighter sim, or running and gunning like an FPS, the gameplay would center on pushing and drifting, with grappling and slinging via grappling-hook-gun later on. Other additions could be magnetized footwear, so one could stand on "stars" and walls, or even run along them to get momentum. The mechanics (if not the graphics) could even be fun on the Wii.

And that's the critical point. A game like this could be fun if executed well. It's not exactly likely that it would be, given the track record of movie games, (there have been so few book games there's no track record there to speak of). On the Wii, skilled MotionPlus programming (which cannot exist, since developers didn't even know MotionPlus existed until rather recently) would be prerequisite for this to result in anything but a WiiMote-waggling travesty. Controls and animation timing would be just as crucial on a gamepad-based version on the PS3 or 360. This is just a flight of fancy, so feel free to shoot it down to reality.

Until then, remember: the enemy's gate is down.