Meh. The Atlanteans had too many curses anyway. Blonde hair. Purple eyes. If he doesn't have blonde hair, I wouldn't care. Only thing that's annoying is that DC's JLA is going to literally be all black/brown hair. WE NEED HAIR FOLLICLE DIVERSITY!
One way AoU could end: They realize they can't defeat or kill Ultron because he keeps coming back no matter how many bodies or computers they destroy so they sent him off into space where he will return as the main villain in GUARDIANS OF THE GALAXY 2: THE ANNIHILATION SAGA