In a recent leak that saw the entire GTA 5 source code appear online, several pieces of cancelled DLC were discovered.
Leaked email suggests new GTA 6 information is coming soon
Screenshots of the cancelled Liberty City expansion for GTA 5 have leaked online
GTA Online: The Contract DLC Complete In-Depth Guide - GTA BOOM
Rockstar scraps more GTA 5 mods amidst GTA Online expansion rumors
Reputable leak for next DLC : r/gtaonline
According to a leak, Eight DLCs were canceled for GTA 5
D.E.P Definitive Edition Project (@d_e_p_official) / X
GTA 5 Had Numerous DLC Cancelled According To New Leaks
Grand Theft Auto 5 Leak Reveals Eight Canceled Single-Player DLCs
GTA 5 source code leak — what has been revealed