Echo was in an early OW design - General Discussion - Overwatch Forums
Echo is Now Live on the PTR
What if Instead just a "hologram" Echo was able to adapt her body to the design of the targeted enemy (FanArt by Dana Pull on Artstation) : r/Overwatch
Overwatch: Echo Release Date, Abilities, Gameplay, and Trailer | Den of Geek
Overwatch: Echo Origin Story, Nationality, and Language Explained | Den of Geek
The Overwatch Echo Release Date Is April 14, 2020 - Siliconera
Overwatch Hero 31 News: Echo character confirmed, but Blizzard might not release her next - Daily Star
New Overwatch hero Echo spotted in leaked artwork | PCGamesN
Echo - Overwatch Wiki
Its an old OW slide with concepts for heroes. That Iris looks like Echo from Reunion! : r/unitlost