Star Trek: 12 Subplots That Went Nowhere
3. The Klingon War
This one might actually more accurately be described as a "main plot that went nowhere"...
When it premiered, Star Trek: Discovery was ostensibly about what happens when you put do-gooding Starfleet scientists in the uncomfortable position of fighting a brutal war against an implacable foe. Indeed, much of the first half of Discovery's premiere season focused on getting the USS Discovery's spore drive up and running to give Starfleet the edge against the Klingons and win the war.
The show vacillated between telling us the Klingons were winning and telling us the Federation was winning the war, and then it shunted Disco off to the Mirror Universe for half a season. By the time the crew returned, the war was basically lost as was all hope.
Two additional episodes were doled out at the season's end to wrap things up and while the Klingon-Federation War was hyped to be a near-unwindable conflict, the industrious crew of the Discovery ended the war by throwing a bomb down a chute on Qo'noS.
The two episodes that quickly concluded the Klingon War were, in reality, added to the series order by CBS possibly indicating the producers intended to continue the plot into Star Trek: Discovery's second season. With two additional episodes added to the schedule, the show found a quick way to wrap things up and move on to greener pastures with the Red Angel and nobody complained.