Is Michael Porter Jr. a STAR or just a GUY?

Ryan Blackburn breaks down the last two seasons of Michael Porter Jr. since returning from his third back surgery. MPJ was long believed to be a future star, but he's merely a solid starter at this stage of his career. Does Porter have more to offer during what should be his prime years? If so, how can the Nuggets help him achieve that level? An improved MPJ would improve Denver's title odds as well.