John's Clone / ODST Rookie

Maybe John’s Clone never died? Could it be the Spartan on top? Or what about the rookie from ODST?

The new guy is a new character entirely.

You should check out the discussion happening here:

https://forums.halowaypoint.com/yaf_postst242485_Halo-5--Guardians-REVEALED--Update-2--NewGuy.aspx