Sunny day. Cloudy forecast. What’s next for Zack Wheeler? A Grapefruit League start Monday. And after that, the great unknown for the man whose future has been on hold for two years now. The long-inactive right-hander threw three up-and-down relief innings for the Mets on Wednesday, taking the loss as the Marlins prevailed in a 15-9 slugfest at a bright and shiny First Data Field. You could understand if Mets officials came away from this performance more torn about Wheeler’s April assignment than they were before it. Every option — putting him in the rotation, placing him in the bullpen and keeping him in extended spring training — should remain on the table at this juncture. “It’s up to those guys,” Wheeler said, referring to the Mets’ brain trust. “I’m trying to get out of each outing healthy, build my pitch count up and we go from there.” He professed that he felt fine after giving up four runs on four hits and three walks while striking out one, and his velocity backed him up. His fastball came in mostly at 95 to 96 mph, and he threw a few heaters that registered 97. His pitch count increased to 65.