Yeah we all know that it started to go back in order but we dont know if LCS and VCS were not just little, but good, fill ins until GTA IV. Another reason we're not sure if SAS would be the next PSP GTA game is because all of SA is too big to have on a UMD which got us thinking it might be just one of the cities instead of the whole state of San Andreas, most likely Los Santos if not the whole state. Then again San Andreas might be able to fit on a UMD which has been argued for a while because some are talking about everything that SA had with more added along with a decent amount of missions while others just think these people mean just the map. So it is still undecided that they'll have another PSP GTA game since they have new systems and yes I know they have two different branches of Rockstar working on the big console GTA games and the PSP GTA games. All I have to really say is if in 2008 Rockstar decides to make or release another PSP GTA game it'll most likely be in San Andreas, Los Santos if not the whole state according to my radio theory.
Yeah but you have already disproved your initial theory because you said that mentioned Las Venturas was mentioned in LCS and obviously wasn't the next game. The chances are that if they do the next game as one city then it will be Los Santos because it continues the order of the cities you play - Liberty City > Vice City > Los Santos > San Fierro > Las Venturas.