Is This "Superman" phone From Microsoft?

Last month it was rumored that Microsoft plans to release two new smartphones Lumia series. Now, one of the leaked images of both devices has surfaced.
Figure reported by The Verge that displays a green mobile phone is believed to be the Lumia 730.

Smartphone that has the code name "Superman" is allegedly the successor of the Lumia 720, and has been introduced by Microsoft devices division head Stephen Elop in an internal meeting.
Lumia 730 is a phone that emphasizes function alias selfie self portrait with a 5-megapixel front camera.  
Lumia 730 Screen size 4.7 inches predicted. In addition to a handful of this information, not much is known about the specifications of the Lumia 730, as well as a schedule in which it occurs is still unclear.

Lumia 730 in the picture seem to run a firmware with the code name "Debian Red" which is similar to the name of a Linux operating system, although actually refers to the type of color.
Previously, Microosft using the code name "Bittersweet Shimmer" to update the OS Lumia Black and "Cherry Blossom Pink" for Cyan Lumia OS update.