I doubt it, plus I do not really care if they do or dont. Gears outwore its welcome with me by the end of the 3rd game, I enjoyed it and thought it was a decent way to put the series to bed. The first game back then on the 360 at launch was great, never played a game like it and it looked great for the time but after three games and hours of horde mods I was pretty much through with it. Never even considered buying Judgement and I wont bother with any PC versions, the only thing I would consider getting when I get an Xbox: One (when its the correct price for its anaemic hardware and has no Kinect) is if they made a new series with new characters set in the Pendulum Wars.
Just Humans and no existing characters and just use the basic mechanics and the existing world, throw in a semi persistent online multiplayer too with a persistent war that resets when one side wins and give the "winners" some achievements or rankings. Either that or a Halo 4: Spartan Ops style co-op campaign, those are the only things that might persuade me to ever buy another Gears title.