Missy

Here's the story:

My dad got his green card years ago, and sponsored my brother, who moved to
the US (From Canada)

My brother never bothered to look into what he had to do in order to keep
said green card once he had it

My brother would stay in the US for anywhere from 2-20 months, come back to
Canada for a similar amount of time, then go back to the US

My brother never worked in the US

Last April, his card was up for renewal, he went to the office, where they
promptly took it back, saying he shouldn't have had one in the first place,
he isn't supposed to be going to and fro (US to Canada) either, and he is
unemployed

A week ago, he came here for a visit, and when he showed up at the airport
to go back to the US, they wouldn't let him in, saying his history shows his
propensity to stay in the US for more than 6 months, when he is not allowed
to, and he had no return ticket to Canada to prove he was going to come back
(to Canada). He's pissed off (it's his own fault, I know), and now says he
can probably get this all cleared up by going to an immigration judge.

What are the chances they'll let him back into the US? I told him to give
it up, stay here, where he's from, and where he can actually work, but he
seems to think the US immigration judge will let him go back.

So, my questions:

What are the chances they'll let him back in? What are the chances he'll
even get a green card ever again?

Thank you!