This seems like an appropriate time for me to share my fanfiction for season 5.
My basic idea for the next seasons of Flash and Arrow are to flip the types of threats the shows deal with. With Flash, that means going up against an organization with larger plans (my idea would be Mercury Labs and their attempts to weaponize meathumans).
But with Arrow, I'd start the first few episodes with Oliver being comfortable with whatever status quo exists. Have him being super-confident and competent dealing with a few super-powered villains of the week.
Then, around episode six or so, towards the end of the episode, have that week's villain nearly escape from Oliver, only for them to be swept up by a Superman-type metahuman (use an alt-universe Superman stand-in like Optiman). He's a ridiculous superman-as-boy-scout pastiche. Have him be around in the background doing big things like saving planes and stuff, wanting to team up with Oliver for certain threats, the works. Have Oliver be skeptical about this new ally, but reluctantly accept his help because all the villains he's facing now have powers.
Then around episode 12 have a stinger where Optiman scoops up a petty purse-snatcher, flies him up over the city and fucking incinerates him right there with his laser-eyes.
Eventually Oliver is run out of town by Optiman and he sets up in Central City to plan his next moves. We discover that Optiman ties into the Mercury Labs plot over on the Flash. The rest of the season is Oliver preparing to take down Superman.
