I maybe one of the only ones who liked the OMAC series when the New 52 started but thats me. I thought the Book was a great fun read. I thought OMAC was a cool character as well. I know he was put into JLI i believe and i havent heard anyhting else about him. Is he still around in the New 52??
OMAC was indeed an awesome series. As Mr. Holmes said, the JLI annual hinted at him appearing again in the future, and DC Universe Present #0 had an origin story about Brother Eye by the same people who did the series.