1. Arrow steals Batman villains
Less bothered by Deadshot in season one and more-so by Ra's Al Ghul and the League of Assassins and the shirtless sword fight with Ra's, the parallels are undeniable.
2. Cupid is a Harley Quinn knock-off
This character is weak anyways, I could tell Arrow's writing was dwindling when it seemed like every week's villain suddenly was a master archer. Harley Quinn is a psychiatrist who falls madly in love with the Joker, and today has wound up on the Suicide Squad, it's easy to see with all the hardly veiled thievery from the Batman franchise that Cupid -who becomes obsessed with the Arrow (what's wrong with calling him Green Arrow?)- is nothing more than an attempt to copy the ditsy, obsessive psycho traits of Harley Quinn.
3. Deadshot origin in episode 'Suicidal Tendencies' is an American Sniper rip-off.
Not to say that Deadshot's origin story didn't already exist before American Sniper was written but the creation of this episode seems like an obvious attempt to coast off of the success of American Sniper with it's similar story about a PTSD sniper for the American military who comes home and struggles to deal with day-to-day life.
4. The Atom is going to be first an Iron Man rip-off (and a couple months before Ant-Man is released will try to coast off of it).
There have been complaints that Ray Palmer's billonaire genius philanthropist eccentric persona and bionic flying suit most certainly have direct correlations to Iron Man -this much is undeniable. People are also saying that this will get better because the Atom's comic book powers of shrinking are going to shown on the show soon, but I believe this is another attempt to coast off the excitment of Ant Man closer to the release date.
5. The New Count Vertigo is a rip-off of Ra's Al Ghul from Batman Begins.
Case in point, the folks at Arrow even tried to get Liam Neeson to play the new Count but he declined. Count Vertigo's new formula that when he was injected brought out his worst fear is obviously close to Batman Begins' fear vapor.
6. Brother Blood was a rip-off of Scarecrow from Batman Begins.
With Sebastian Blood's mask (which looked like they were almost trying not to make it look like Scarecrow's) his testing of the Mirakuru formula on unsuspecting individuals and a spooky voice this guy is just another example of the Arrow writing staff's laziness.
Look, up until this season I enjoyed Arrow a lot -I enjoy the Flash- and I thought the Ra's Al Ghul/Oliver duel was badass but all this blatant coopying is simply lazy and boring to watch. And I think fans are gonna stop forgiving it soon.