For Playstation Plus subscribers the below has been announced for Dec and Jan so hold off buying the below and wait for them to be released on the store.
Beyond that, in December we’re adding Injustice: Gods Among Us Ultimate Edition and Secret Ponchos to PS4's IGC line up. Injustice: Gods Among Us Ultimate Edition is the first AAA Blu-ray title to join the Instant Game Collection for PS4, and we think you’re going to love it. Then in January, we’re adding inFAMOUS First Light and The Swapper for PS4. We will still add DRIVECLUB to the PS Plus line up when it becomes available.
So, to recap:
Injustice: Gods Among Us Ultimate Edition
inFAMOUS: First Light