That was kind of a shitty thing to do and not only not follow it up in any way, but start actively teasing that one of Arrow's main characters was a version of another GL instead. And supposedly both Hal and John were off limits due to the DCEU, yet they allowed them to shoehorn in the "Diggle is GL" thing. All the Hal teasing during the early seasons was literally for no reason, especially when both of his bffs had their own shows.