A developing subplot in the Trail Blazers season has been the reemergence of Maurice Harkless over the past week. In what has largely been a disappointing season for the one-time starting small forward, Harkless has recently flourished while being reinserted into the rotation because of injuries. Last Sunday, he hit all five three-point attempts in Boston en route to a 19-point, 8-rebound performance. And late in an overtime win against Charlotte on Thursday, he made a key block and a flushed a game-clinching dunk off an offensive rebound. He then scored 15 points Friday at Sacramento, and was a key element in the Blazers putting away the Kings in the fourth quarter. Coach Terry Stotts, who through the first two months of the season went through a somewhat trying exercise in reaching a nine-man rotation, now has an intriguing decision ahead of him: What to do with Harkless? “Let’s just talk about tonight,’’ Stotts said Friday when asked about his dilemma. Harkless started the first 19 games of the season, but drifted into anonymity and eventually onto the bench amid poor shooting and energy-less play. To his credit, he remained ready after his demotion. He was the driving force in a December victory at the Lakers, scoring 22 points, and he was a boost with 19 points in a January home win over San Antonio. This latest development was spurred first by a toe injury to Shabazz Napier, creating an opening in the Boston game, then a calf injury to Evan Turner, which has pushed Harkless into the starting lineup as Turner missed one game and has been on a minutes restriction the past two games. Stotts started the season with Harkless in the starting lineup because he liked the defensive versatility he provides while paired with power forward Al-Farouq Aminu. The two long and lanky forwards can switch defensively on pick-and-rolls, and when energized, Harkless has athleticism unique to the Blazers.