Nagisa Furukawa wrote:
Simple solution: pull a Justice League cartoon and bring in John Stewart. Distances itself from the 2011 film, emphasizes that a "Green Lantern" is more like an intergalactic cop than one superhero's identity, allows for a more stern figure than contrast with the more light-hearted Flash, and of course, adds some diversity. Sorted.
Not to mention that it gets rid of one uninteresting character and replaces him with a more interesting one.