1. Driver - The game was a f***ing juggernaut on the Playstation. The first 2 driver games sold almost 11 million according to VG. They kind of screwed up the series with Driv3r and Parallel Lines but it could still be saved if they do a good job.
2. Crash Bandicoot - Speaking of juggernauts, the first 3 games on the PS sold over 21 million copies total. It might be too late to save it, but if a great developer took over the game and it was heavily advertised it could do well. Crash Bandicoot (PS1 days) > Mario
3. The Getaway - It did pretty well, I think the first one sold like 3.5 million or something. They need to get back on the Getaway 3.
4. Medal of Honor - MoH Frontlines was one of the best WWII games ever, no reason this series can't pull a Call of Duty and put itself back on the map. Of course they'd have to move away from the WWII setting.
5. SOCOM - Fuck Slant Six, put Zipper back on it and release SOCOM: U.S. Navy SEALs 4 for the PS3 complete with a full single player campaign and 16 or 32 player online.
6. Star Wars Battlefront - The first 2 each did over 3 million on the PS2, they should definitely make a SWB3.
there's more but that's all for now