What's in, what's out in the hockey world for 2020Maddie Meyer/Getty ImagesGreg Wyshynski, ESPNJan 1, 2020, 12:39 PMCloseGreg Wyshynski is ESPN's senior NHL writer.Follow on XEmailPrintWhile some trends in the hockey world will surely continue in 2020, others will undergo a transformation. Get caught up on all of it right here: