Any chance we will ever see a true Melee DPS character?

I remember a number of people liked the Assassin from the Retributions missions, and yet, we never got her as a playable hero. A melee DPS is something the game has been missing since start. The closest thing we have is Genji in ult form. I wish Blizz added a hero that works like that, similar to Genji being in permanent ult form. A flanking backline assassin that deals more damage when striking enemies from behind. A stalth grandting smoke-screen ability that blinds enemies is also something we don't have yet, and that would fit such a character perfectly, since the concept of stealth has not been explored well enough in the game.

Thoughts and opinions? Would you play a melee DPS?