DC has announced that Ivan Reis and Joe Prado are now the ongoing art team on Justice League, beginning with issue #15 in December.  The new series, which launched as the flagship in the "New 52" makeover of the DC line, had a high-ranking duo as its creative team for the first year: Chief Creative Officer Geoff Johns and Co-Publisher Jim Lee.  Since then, Gary Frank and Tony Daniels have been handling the art on an interim basis.  Now DC has assigned a new team for the long term.
The company said there will be "major news" on Lee’s future work coming soon.