KDVR & KWGN will remain a duopoly.

It appears that KDVR FOX31 & KWGN Colorado's Own Channel 2 will remain together, Nexstar announced it's divestitures yesterday and Denver wasn't on the list.  However KMGH/KZCO-LD's owner Scripps & KUSA/KTVD's owner Tegna appear to be the big winners of stations after this announcement.

https://www.nexstar.tv/nexstar_tribune_divestiture_agreements/