If Bryan didn't get the Pizzeria: Bryan would most likely live a normal life and wouldn't ever meet the animatronics until either Jon or Chris told him about the Pizzeria.
If Jon got the Pizzeria: Jon would most likely only care about himself and not really make friends with the Animatronics and would never let Helpy get the theme park or make the Starlight mall.
If Chris got the Pizzeria: I think that Chris would be like Bryan and make friends with the Animatronics and would care about them. Molten wouldn't be so scary to someone who has been through attacks with Nightmare Animatronics and Springtrap wouldn't hurt his son.
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TheFamousFilms what if stories
Fanfictionthese stories are my own ideas OK? Edit: I have started taking requests