Renegade Squadron. In spite of the handheld's diminutive capabilities, the wizards at LucasArts managed to get 16-player infrastructure gameplay onto the system. The upcoming Force Unleashed reaffirms the commitment Lucas has towards the PSP.
A new listing on amazon.com shows Star Wars Battlefront III arriving on PSP, in addition to every other platform out there. With the last PSP Battlefront game being such a success, we can only hope that this listing turns out to be real. Guess we'll have to wait until E3.