Dev hints there are clues on the beta site as for a date on information prior to beta opening on ps4. If you look at the last picture you can make out four numbers. 3 4 3 3. My guess is this: 3+4 3+3; which would give you information coming out 7/6. A week before beta goes live. Coincidence? I think not.
This was cracked 6 hours ago on Reddit. When the answers are entered all it does is show character Bios of Poison Ivy, Harley, and Scarecrow.
For those interested:
The first spot: Type "yeah right"
The second spot: Type "botanical gardens"
The third spot: Type "your greatest fears"