There is still not enough information to confirm that Catherine 2 is coming our way but a recent interview with Midnight Venus suggest that Atlus might be working on it right now.
Midnight Venus was invited as a special guest on an Atlus broadcast and in the broadcast, Midnight Venus played the host. After the show ended, she stayed to talk to the Studio Zero staff and conveniently mentions a job offer that she got from Atlus.
In the conversation, she said that she is looking forward to the new fantasy RPG and that she will be the new heroine. She added that she was just kidding but some fans are ready to believe that there might be more to it.
Of course, it is hard to determine what is going on right now but how many of you are actually waiting for a new Catherine game?