From the "International Hero" website and the paella-scented beaches of Spain comes "Gavilan", whose name means "sparrowhawk", and who looks nothing at all like Nightwing.
See, Gavilan's costume is red. Yeah. And his cape is longer and more festively-pointed. And, and, there's those little bird claw/animal tusk/crescent roll thingies on his wrists. So that's different. Plus! He carries around that big bo staff or stripper pole or what-have-you. Nightwing doesn't do that. Not all the time, anyway. Not to mention, he has that ponytail. Nightwing doesn't have one of those... er, anymore. And Gavilan's mask is birdlike in a completely different way from Nightwing's.
So I think you can see how Gavilan's costume is not at all a rip-off of Nightwing's. AND I'LL FIGHT ANYBODY WHO SAYS IT IS! *glances around menacingly, while stuffing invoice for designing Gavilan's costume into back pocket* (Shut up. I wasn't feeling well that day.)
UPDATE: So, I'm guessing you were having trouble swallowing the notion that Gavilan's hideous togs were designed by me. Yeah, I can relate. I didn't even remember doing it! All I had to go by was the fact that Gavilan contracted my services, some time back, and, of course, this invoice. I was baffled! Still, I have my pride. I wasn't about to admit a mistake.
And then, Storm Boy showed up on my doorstep.
I asked him what the occasion was for his visit. And he smirked at me, and said, "The occasion is, I'm here to get paid, BEYOTCH!" And so I punched him in the face.
"Sorry," I demured. "Reflex."
Choking back tears (and blood), Storm Boy whined, "What the hell?"
"No," I retorted, "That's what I should be asking you. I'm glad you've got your confidence back to the point where you can josh around with me, but I draw the line at 'beyotch.' Reel it back in a couple of meters; you're getting annoying."
He grinned, impishly. "Oh, fiddle-faddle! If the crowning of Christian Siriano last night (your readers' time) as 'Project Runway Fan Favorite' has taught me anything, it's that everybody loves a finger-snapping, trash-talking, in-your-face bitchy queen. I've got 'attitude' now! Deal with it."
Naturally, I punched him in the face again. "Oops. Looks like my fist has an 'in-your-face' attitude!"
"God! Uncle already, you freaked-out maniac! Just give me my cut from the 'Gavilan' costume design so I can get the hell out of here." He wiped the blood from his nose with his palm, and then he held out the crimson-stained paw, in expectation of payment.
"So that explains it," I said, with a massive sigh of relief. "I didn't think that looked like my work."
"That's because I did the whole thing," Storm Boy sniffled. "You were all feverish and shit from that depilatory the Blockade Boy Revenge Squad had slipped you, so I worked on it while you tried to shout directions at me from your sickbed. We had kind of a Mozart/Salieri thing goin' on. If Salieri had completely ignored Mozart's idiotic ravings, that is."
"Wait, so you want to be Salieri...?"
"I want to get paid," he shrugged. "Fork over the space-cheddah, shaggy man."
And so I did... gladly. I just didn't want to be held responsible for that costume!