Deadpool isn't a rip-off of Deathstroke, but he was definitely supposed to be a parody. However, like Green Arrow in the comics, he grew away from his inspiration into his own character that is very distinct from the source material.
Also, was Shazam ever anything like Superman beyond the look and the flight + strength? Even the power set was different, and the civilian identity is worlds apart. Was Billy ever not a little boy?
The thing with the Batman/Arrow comparisons is that people aren't saying that Arrow is ripping off 1941 Batman (the Batman that Green Arrow was ripping off) but that he's ripping off Nolan Batman, who wasn't the greatest detective, who wasn't a tactical genius, who was capable of happiness. In that sense, the killing thing was in the minority as one of his traits that separated them, but now he's full on 'no killing' even when it might be justified, he's mixing it up with the League, he's not a hopeless womaniser that can't control himself, he's not protecting the little guy (or anyone except Malcolm, apparently).
He's definitely not a carbon copy, but he is a lot closer to Nolan Batman than to any interpretation of Green Arrow, from the last thirty years at least.
Team Gotham: "Nah, we're gonna win. We'll have her be okay with random children living out of her house, be all creepy with one of them, get mad that Gordon is dating someone else after she leaves him and slept with her ex anyway."
In fairness to Gotham, Gordon's relationship with Barbara is doomed to fail; their relationship is supposed to be based on weak foundations, and growing up in that environment would partly explain why James Jr. turns out to be such a psycho (also the sociopathy). If anything, they are building his relationship with his actual soulmate, Essen, rather nicely, starting as they are now with mutual respect and camaraderie, both pushing back against corruption in the best ways they each know how. (Though Barbara was super creepy and molester-y with Selena)
