A new teaser has been released by Blizzard showcasing a new character that will more than likely be due soon.
The teaser does reference other characters from the game such as Soldier 76 and Reaper, but no more explained.
Make of the teaser as you will, but it does look like a new support/sniper hybrid is coming to Overwatch.
[ARCHIVE] Communications Records of Ziegler, A. – Overwatch File 00231 – Security Classification: CONFIDENTIAL pic.twitter.com/lLAxTL2DhO
— Overwatch (@PlayOverwatch) July 6, 2016