After you have completed the game and taken over everything what happens after for Tommy? Read on
In 1992 when GTA San Andreas is set on the Introduction DVD Ken Rosenberg is seen making a call to Tommy but is refused by someone on the phone. It could be argued that it is some receptionist however we do not know for 100% fact who answered the phone if this was a man or women or even anyone working for Tommy. This can be seen on this
video from 12:32
However there is multiple references made to Tommy in one way or another threw out the GTA San Andreas Introduction DVD for example directly from the mouth of Salvatore Leone also from GTA 3 and GTA Liberty City Stories he states to Johnny about how he thought he thought he ran things in liberty city since sonny forelli got pasted(killed) down in Florida aka Vice City, not one mention is made of Tommy but it is clear this is a reference to him. This can be viewed from 9:24 into the above linked video. before this Ken is seen at the Fort Carson Medical Centre in San Andreas indicating the reason he is no longer with Tommy is due to a drug problem..
In the full game GTA San Andreas there are references made to Tommy in the mission the Meat Business with Ken Rosenberg Ken mentions Tommy in front of CJ and Cj does not seem to have any clue who Tommy Vercetti even is.Video and time included
play from 6:06 for the Tommy reference
Last but not least in GTA San Andreas the truth mentions a mob take over of a garage from Vice City clearly a reference to Tommy Vercettis mob showing that after Tommy took over Vice City he expanded into San Andreas with the garage. Hopefully some can post the name of the mission where he says that as i have been unable to find it.
In GTA Liberty City Stories outside the Saint Marcos Bistro there are three billboards one has the apartments from Vice City as what they looked like under Vercettis control and with it being 1998 seems to suggest tommy is still in control. When you look at GTA Vice City Stories set in 1984 when you take over business with Victor Vance or gain turf things change or businesses look a lot different. The apartments in Vice City on the billboards outside the Saint Marcos Bistro in GTA LCS 98 seem to suggest this as no changes have been made since 1986.
On the website Kent Paul set in October 1st 2012 http://www.kentpaul.com/ there was a small comment from Kent Paul on a page stating Tommy is still alive and in power.
After this date it is unknown what has happened to Tommy or if he is still in power. These are all valid and confirmed facts. Thanks for reading and hope you enjoyed the read. Feel free to share this post with others all i ask is that you give credit.