Grant Gustin as Eobard Thawne/Reverse Flash
One thing I'm wondering is how they are going to introduce Eobard Thawne/Reverse-Flash in this movie if the film is going to be based on Flashpoint. The main appeal of Thawne's involvement in the Flashpoint story is that he and Barry have already been bitter enemies for years and years, and now their rivalry is coming to a deadly climax because of Barry's mistake in changing the timeline. How are they going to build up that rivalry between Barry and Eobard in this movie if we've never met Eobard before?
The movie is going to have to juggle so many elements such as Barry's origin story, his relationship with his parents, his grieving over his mother, and his decision to save his mother by changing the timeline. How are the filmmakers going to handle all of these elements while also introducing Thawne and inserting him into the Flashpoint story?
Kylo Ren himself...Adam Driver as Professor Zoom/Reverse Flash
My 2nd choice would be Jonny Lee Miller
I think in this version, they will introduce Eobard and create the whole idea of a man in yellow killing his mother and Barry realizing it is this man after he goes back in time to find out who it was with his new found powers, then changing the whole timeline. While Eobard comes up numerous times in the changed timeline as well. They don't necessarily need to have a huge history, Eobard just needs to mention how he is from the future and how much he aspired to be against him. I think the best route would be for them to go a Tim Burton Batman route where that film laid out his parents killer was the Joker while they also introduce the Joker and his origin story. They could go with that with Eobard, it will allow a much less experienced Barry making a sudden impulsive reason to stop him murdering his mother.
I think they don't need to create a long history between the two, just introduce him just like Goblin or Joker in one movie.
I really want Adam Driver as well!
Domhnall Gleeson
No, no, no!! What if Barry changes his suit? Eobard can't keep wearing the same reverse suit to Barry, especially when Eobard come from the future and wont necessarily know which suit Barry will be wearing at the time of their interaction.Matthew Mcconaughey.
I like the name Professor Zoom, but it's ridiculous so probably just Reverse Flash.
The costume? Just be the reverse of Ezra's.
Boyd Holbrook is my pick.