DC Comics waited too long to file its copyright interference suit in the battle over who owns Superman, says the lawyer of the estates of Man of Steel co-creators Jerry Siegel and Joe Shuster. In another round in the multi-front fight between Warner Bros and the estates, attorney Marc Toberoff on Monday cited statute of limitation laws and asked the federal court to dismiss (read it here) the suit DC’s corporate owners filed against him almost three years ago. This move comes less than a month after the 9th Circuit Court of Appeals essentially handed WB full rights to Superman in a related copyright case — a big deal for the studio, whose reboot Man Of Steel flies into theaters June 14. In its May 14, 2010 suit, DC Comics claimed Toberoff meddled with the 1992 copyright agreement the company had reached with the two estates. It also alleges Toberoff drafted overriding agreements with the estates in 2001 and 2003 to recapture DC’s Superman copyright interests and to position himself and his companies to secure a controlling financial interest in the families’ claims.