She is the next hero coming to Overwatch and she is playable at BlizzCon. It appears the Mexican operative is an offensive character, and can hack, turn invisible and translocate.
According to the official website, Sombra makes use of stealth and debilitating attacks which makes her a “powerful infiltrator.” Her hacking can disrupt her enemies, and her EMP can take on multiple foes at once.
She will be playable on the PTS next week along with a new arctic map, Ecopoint: Antarctica, which is designed around 1v1 and 3v3 in a playable in Arcade mode.
Oasis is another map for 1v1 and 3v3, and it will arrive on the PTS in December.