I think I agree with the concern that the tv show already covered most of the meaty parts of Barry Allen’s story. Even with other heroes who have been played by several actors like Batman and Spider-Man, it still seems there’s still a lot of fresh material to mine from since they can only use so many villains per movie and so far they tend to reboot with a fresh new version after 2-3 films. But the Flash show, while it can be flawed at times, took one version of Barry, followed him from the beginning of his career, had him fight the vast majority of his villains, got his dad out of jail, did time travel, the speed force, multiverse, married Iris, did Flashpoint and crisis, teamed up with Jay Garrick and a version of Wally West, and helped form some kind of Justice League. There is a lot of room for improvement and whatnot. But still they covered most of the juicy bits. I echo what others said, if it were up to me, I’d say they should finally give Wally a shot. But I’d they don’t, there are a few things they could do
-The Rogues as a team
-Have Hal Jordan be his best friend
-Maybe use Daniel West instead of Eobard Thawne?
-uhhhh blonde hair?
****, I couldn’t even come up with 5.