You may recall that Bethesda promised a code to get yourself into the DOOM 4 Beta if you purchased Wolfenstein: The New Order. However, if you're still gaming on a PlayStation 3 or Xbox 360, then you're out of luck.
You'll still get a code, however the Beta is only open to users of the Xbox One, PC and the PlayStation 4. So if you buy an Xbox 360 version you'll get a code for the Xbox One version, and if you purchase the PlayStation 3 version of Wolfenstein: The New Order you'll get a DOOM 4 code for the PlayStation 4.
Wolfenstein: The New Order will launch worldwide on May 20th, but there's no word on dates for the DOOM 4 Beta yet.