User blog comment:Chinkycandie/Abandoned Plotlines/@comment-24152851-20171226081855

I wouldn't really call the Solomon Grundy one abandoned though. That was either an Easter Egg which they didn't intend to further exploit, or foreshadowing for his later return after zombies got introduced into the Arrowverse.

Also the Suicide Squad one isn't there fault. They really wanted to reuse this team, but DCEU forced them to kill key characters off and never mention them again. Shame really, since Arrow did Suicide Squad far better than DCEU did.

One that they didn't mention was Iris losing faith in the Flash after he was whammied by Roy Bivolo. She seems to have forgotten all about it by the next episode.