Sorry if this has been posted already, I couldn't find it... Apparently a Spanish site got access to new information (stress only rumored!):
Franklin starts at the bottom of the "crime ladder" and restores cars cars for a "crappy" Armenian named Simeon Yetaria. You can check the bank balance of your character via ATMs There are hitchhikers in the game. Michael has a special mini-game in which he can attempt to rob ATMs. There are no internet cafes, instead you can access websites and social networks from your in-game mobile phone You can park your car, ignite the gas tank and explode the vehicle to destroy it/other people/things Hundreds of pet accessories are available If you have a dog, it can die or get lost. You can then purchase a new one at a pet store The meat you obtain from hunting can be sold to food factories and farms. The meat is then used by in-game burger joint "Burger Shot". If you park your car on the street without a parking ticket it will be towed away. It is possible to reclaim your vehicle by paying a fine to the relevant municipal department Character special abilities are activated using L3
Taken from http://www.gta5cheats.com/new-gta-5-rumors/
All sounds fun to me, apart from the parking part, should just be towed if its on the road/sidewalk and have a time limit of say 5 realtime minutes, then a truck arrives to take it and you could stop them.
Parking on the side of the road and in lots should let your car stay forever.