By not means an exhaustive attempt to list all the upcoming titles and indeed part of the joy is unknown games coming out and being extremely fun.
Firemint Real Racing. Upcoming racer that is generating good buzz.
Video
Website
Preview
Tiger Woods PGA Tour. An iphone iteration of the EA sports golf franchise.
Preview
Video
Peggle. iPhone version of the PopCap classic.
Video Ipod Click Wheel Version
Preview
Rolando 2 & 3. Follow ups to the big hit, Rolando, tentatively dated for May and October.
Info
Audio Surf. All we have to go on right now is a cryptic "I'm on it" email to go off from the developer of the hit PC game when asked about an iphone version of his title but with access to the music library available in the 3.0 version of the OS things are looking up.
Video of PC version
Screenshot of PC version.
iD Games. John Carmack has signaled that he is very supportive of the iphone and plans to hopefully bring Wolfenstein RPG, Wolfenstein-3D, Doom, & Quake.
Info
Need for Speed Undercover. iPhone iteration of the Need for Speed Franchise.
Video
Star Defense. Tower defense title coming from ngmoco that looks to use a 3-D sphere for the playing surface instead of a flat plane.
Info
Video
Circuit Strike.One. Space shmup that looks to have a nice visual style.
Info
Video
Noby Noby Boy. Some version of the well received PS3 title from Keita Takahashi, creator of Katamari Damacy, is coming to the iphone.
Info
Video of PS3 Version
Screenshot of PS3 version
Dexter. Not much is known about Dexter other than that it is of course based on the Showtime series.
Video
Preview
Toki Tori. Not yet released Wiiware port of the puzzle/platform title.
Info
Preview
Video
LiveFire. Upcoming online player first person shooter. Will be one of the first games to employ in game DLC.
Info
Video
Galactic Gunner. Upcoming 3-D space shooter. Not much is known other than that.
Info
Video
Thor & Legion of Amon. Both titles are coming from the devs, On the Rocks Productions. Thor is a side scrolling action game. Legion of Amon is likely to end up being the first Diablo style loot game on the platform although it will be turned base rather than real time. It's further out from release than some of the other titles though.
Website
Info Legion of Amon
Info Thor
Interview
Concept Art.
Reign of Swords: Episode 2. Follow up to the IGN mobile strategy game of year 2008.
Info
Sims 3. iPhone version of the upcoming new edition of the Sims Franchise. Not much is known about how much of the real game this will encompass such as how Spore Origins on the iPhone was essentially the cell stage. What is now however is that it will be one of the first games to employ in game DLC.
Video
Touch Pets Dogs. The iPhone's Nintendogs inspired pet simulator from ngmoco.
Info
Video
Azgard Defence. Port of the Tower Defense game from the Pocket PC and PC Platform. From the makers of Orions: Legend of Wizards & iDracula.
Website
Screenshot of PC version.
Resident Evil Degeneration. Port of the N-Gage and Mobile title.
Video of Nokia N-Gage version
Caster. Port of 3rd person shooter retro title available on the Mac and the PC.
Website
Info
Video
Unnamed Bethesda Softworks title. Bethesda has announced they are working on an iphone game but have not given any details about it.
News Story
Car Jack Streets. Old school GTA style game.
Info
Website
Video
Gomi. From the maker of the underrated free game, Trace, Gomi looks to be a mix of Loco Roco, Rolando, and Katamari. Definitely something to keep an eye on.
Info
Website
Video
Trivial Pursuit. iPhone version of the classic trivia game done by EA mobile.
Preview
Video
Nex. Not much is known about Nex other than that it is a squad based cooperative first person shooter.
Info
Video
Assassin's Creed. Not much is known at this stage other than that some version of the game will be brought to the iPhone by Gameloft.
News Story
Potpourrii. Port of the WiiWare title.
Info
Video of Wiiware version
(Wii screen)
SAGA Tactics. Turn based strategy game that is both persistent and collectible.
Website
Uniwar. Original turn based strategy game for the iphone featuring asynchronous online multiplayer.
Preview
Video
Equilibrio. Upcoming Gravity based puzzle game also available for Wiiware.
Info
Website
Video
Terminator Salvation. Tie in game for the upcoming Terminator movie from GameLoft. No solid info although it looks to be a similar concept most likely to Metal Gear Touch.
News Story
Concept Art
Sky Burger. Upoming casual tower stacking game.
Website
Video
Glu Games. Glu games is a mobile developer that was slow to get on the iphone but they now seem to be fully on board. Cooking Star is a Cooking Mana clone with thankfully more recipes than were brought over in Cooking Mama. Build A Lot is a time management game with a Sim City style theme. Cops and Robbers is a hybrid racing/platformer title. And Glyder is a casual flying collection game.
Info
Website
Video
Freefall'n. There will always be room for fun simple casual concepts. Freefall'n looks to be one.
Video Freefall'n
Graviton. Upcoming gravity and physics based game
Info
Video
Prey. First person shooting coming to the iphone based on the console franchise.
Info
Agile Forces. Not yet released Advance Wars style game. Originally a jailbroken game the devs are working to bring a real version to the appstore.
Website
Video
Mechos War. Another not yet released advance wars style game coming soon to the platform.
Website
Archon Classic. An announced remake of the chess meets combat classic title.
Website
io. Port of a PC/Mac title. Action based 3D side-scroller on rails.
Info
Video of PC version
Myst. Port of the early 90's PC big hit graphic adventure.
Info
Top Gun
Info
Video
Pinball Fantasies. Not yet released sequel to PinBall Dreams.
Website
Video of Amiga Version
(Screenshot below of Amiga Version)
Anytime Pool. Port of the popular facebook game that will facebook connectivity features.
Info
Video
Vans SK8 Pool Service. Not yet released upcoming skateboarding game
Website
Video
Zenonia. Korean action rpg coming from the publishers of Baseball Superstars.
Info
Website
Video
Reiner Knizia games.
Reiner Knizia is a well respected board game designer who is looking for people to port his games onto the iphone.
Info
EA Mobile Line-up. EA has recently announced a number of new titles to be available for the iphone in the upcoming year. I'll eventually break these out into their own listing when more information is available.
Info
American Idol
BATTLESHIP
CLUE
Command & Conquer
CONNECT 4
EA SPORTS NBA Live
EA SPORTS FIFA 09
Madden NFL 10
MONOPOLY
Mystery Mania
RISK
Spore Creatures
SSX