Blizzard announced at Blizzcon 2014 it's new IP in 17 years. It's a team-based sci-fi shooter. There are 12 players total (6vs6) and they can choose between 12 characters, each one with diferent role: support (healer/medic), tank and offense orientated.
Overwatch game was born from the backbone of the project Titan that Blizzard announced this year they will not finish it. Titan was supposed to be a MMO and overwatch was the pvp part of the game like arenas are in World of Warcraft.
The game will not have single player, it's only multiplayer even though all the characters have a nice story and are very complex. Blizzard said they feel like a single player campaign will make the game less enjoyable.
For now there are only 12 characters in the game but blizzard said they want to add more characters in the future, kinda like League of Legends or Dota 2.
Like Dota 2 there will be characters customization like new looks to weapons and clothes. They won't make abilities customizations though as they feel the abilities are working as intended and changing them will not be good.
It's not sure for now how the game will be in terms of money. It will be free to play or subscription base like wow? Blizzard is not sure yet but it seems like they want to follow League of Legends model of F2P. Also they want to support the community modding like they've done with warcraft 3 where Dota was born and wow. Which are your Best Sombra Skins in Overwatch?
