A Seinfeld Theory (well more a fan fic)

So I was thinking, in two episodes of the series Seinfeld, George Costanza mentions having a brother, who is never brought up again. To solve this discrepancy, I propose this: Danny Costanza, George's older brother. Basically a taller, more charismatic version of George who their parents liked more. Unfortunately, when he was around 16 and George was about 12, George convinced him have sex with the girlfriend of a guy who turned out to be a highly-connected local hood. So Dan fled for his life, eventually landing in San Francisco in the mid-60s. And he never really wanted to go back to the insanity of home life in Queens, including insulting Frank on the phone on his 18th birthday. Obviously this has soem resentment for George from the parents, but he still on occasion talked to George.