The season finale of season 5 of The Flash brought back an old nemesis, Eobard Thawne a.k.a. Reverse-Flash hastened the events of Crisis, and news that Flash was missing from the future.
Thawne is free (again)
Eobard Thawne managed to execute another one of his master plans to perfection. He created a new Cicada whose dagger would free him once Flash destroyed it in his past, but also take the lives of hundreds of more metahumans if Barry refused. In the season finale, Barry and Nora were willing to save many innocent lives in the present, even if it meant freeing Eobard Thawne in the future.
The season finale brought about the departures of some characters from The Flash, significant of them being Vibe (or Cisco Ramon) and Nora West-Allen. The exit of Cisco Ramon had been rumoured for months, but thankfully the show didn’t kill him at the end. It was Vibe that died.
Cisco, tired of lying to his girlfriend about his second life, asks Caitlin for the metahuman cure. The parting gift of a suit he left for Caitlin felt like a final “Thank you.” Fans of the humorous guy can only hope he appears in the following season, even if he is no longer superpowered.
Nora West-Allen disappeared as a result of destroying the Cicada’s dagger, which changed the timeline to one where Nora didn’t exist. Eobard Thawne informed Team Flash she had a chance of surviving, but Nora refused to do something that would make the dark Negative Speed Force permanently part of her.
Reverse-Flash also zoomed away after promising to see Barry at “the next crisis,” signalling that he will be there during the Crisis on Infinite Earths.
Crisis on Infinite Earths – The Biggest Multiverse Crossover Event
This will form a major plot of the Flash season 6, as this has been foreshadowed since the premiere of The Flash, five years ago. The pilot episode showed a news clipping from the year 2024, claiming “Flash missing vanishes in Crisis.”
The season 5 finale also cleared that the change in the timeline had sped up the Multiverse event by almost five years, and Crisis will happen in 2019 itself. Reverse-Flash will also be a significant player in the Crisis event, as another news article claimed that “leading an army of ‘shadow demons.'” And now that Eobard Thawne has set himself free in the future, as shown in the season 5 finale, he will be open for this role.
Whatever goes down in season 6, which will air this fall, it will be a life-changing segment of The Flash, as the Crisis on Infinite Earth comics led to Barry Allen’s death when he sacrificed himself to save his world, which fits in the with the news of Flash missing in the future.