Next Grand Theft Auto to the PSP?

So what do you think? The logical step is San Andreas Stories, but will it fit onto a UMD Disk? And at least with the old features such as planes, trains, pysique, ect... that made San Andreas so great? Or do you think it will be something else?

I bring it up because I think I read somewhere a new GTA title will be realeased for the PSP. Anyone think this is true, or will it happen?

Honestly i don't think there will be another GTA game for the PSP. With the success The lost and the damned is having i'm pretty sure Rockstar is going to be just focussing on the next GTA game for X360 PS3.

But if they were to make one i would like to see San Andreas and if that is not possible maybe a new place.