"Subject Sigma" - a new character Overwatch?

The developers of multiplayer shooter Overwatch continue to tease new character. At first, Jeff Kaplan tried to tell about him, but did not work out and instead of details we saw formulas, and then an image of a yellow suit with a barcode and the designation "Subject Σ" appeared. And all this is accompanied by musical compositions.

One of the most plausible theories sounds that the new hero Sigma is either experimental, or a prisoner who enjoys astrophysics. This is hinted at by formulas from the first teaser and by reference to Kepler’s “music of the spheres. Also, the character is somehow connected with the music, because there are notes in the first teaser:

And Jeff himself is sitting in a T-shirt with Lucio. And in the second teaser, play No. 1 from the Gnossiennes cycle by French composer Eric Satie is playing. And the fans of the game know that one of the unrealized abilities of Lucio is slowing down the enemies around him. It is possible that the new skills of Sigma will be associated with this ability.