I would guess Greene or Canha to start the season. And it might be a day to day thing with those two.
Greene, Canha, Torkelson, Carpenter, Keith (in no exact order) are among the top part of the lineup. Meadows, Baez, 3B du jour, Rogers/Kelly (in no exact order) are probably the bottom of the order. Then there are the days off for the aforementioned "everday" players which could throw a wrench into an "everyday" lineup. Or injury could affect it, too.