There are signs that the Well Stacked Pizza Co. from Grand Theft Auto: Vice City and Grand Theft Auto: San Andreas was originally meant to reappear in the game:

• Outside the store "Pizza This", the employees are still seen sporting the logo and some with "Well Stacked Pizza Co." on the back of their shirts.
• Logos and names of Well Stacked Pizza can be found at a shuttered storefront at the Alderney Casino in Westdyke, Alderney.
• The chain is mentioned on the Pißwasser website as a business partner of the beer company.
• When blocking the route of certain taxis, the driver will sometimes shout lines such as "Hurry up, I need to get to Well Stacked!" and on occasion "My Pizza Stack's gettin cold, move it!"
• Pedestrian-to-pedestrian dialog will occasionally involve whether Pizza Stack or Burger Shot is better.