'The Flash' season 3 spoilers: Vibe becomes a villain? Ronnie Raymond to reappear?

Fans are theorizing that an upcoming episode of "The Flash" season 3 could have Cisco/Vibe (Carlos Valdes) morphing into his villainous Earth-2 version, Reverb.
In the previous episode of The CW's superhero series, Barry/Flash (Grant Gustin) was able to subdue Caitlin's (Danielle Panabaker) Killer Frost persona with a pair of power-dampening cuffs and an appeal to her benevolent human side. But now that Caitlin's villainous side has been somewhat suppressed, what does this mean for the flash Cisco had of him fighting Killer Frost at some point in the future? Could Cisco/Vibe actually be the villain in that scenario?
Panabaker recently spoke to Entertainment Weekly about this theory and said, "I love that."
"I think that's what's so cool about our show is that there are so many opportunities for change and growth," the actress said. "You never know what could happen," she added.
Speaking of the show's unpredictable nature, ComicBook.com recently chatted with "The Flash" actor Robbie Amell about his possible return to the series. Amell played the role of STAR Labs engineer Ronnie Raymond, Caitlyn's fiance, in the first season of "The Flash." During that season, Ronnie was presumed dead after he sacrificed himself to save his co-workers from the particle accelerator explosion.
However, Ronnie survived and was merged with Professor Stein, becoming the metahuman Firestorm. He was again presumed dead after he and Stein were horribly injured in the fight against Reverse Flash in season 2.
Amell's third "The Flash" character, Ronnie's Earth-2 version Deathstorm, was later killed by The Flash. But while all three of his characters have already been killed off, Amell said that the current Flashpoint storyline made even the seemingly impossible possible on "The Flash." Thus, the re-appearance of Ronnie, Firestorm or Deathstorm isn't completely out of the question.
"Well the nice thing is when you're dead in that universe there is always another Earth, but I think that version [Earth-1] of Ronnie is dead because he sacrificed himself to save the city, but you know there is always Earth-3, Earth-4, Earth-5," Amell said during the recently held Heroes and Villains Fan Fest in Atlanta, Georgia.
"The Flash" season 3 airs Tuesdays at 8 p.m. EST on The CW.