Lucasfilm is shifting its focus onto the future, choosing to direct its resources to the upcoming new feature film Star Wars: Episode VII and shelve work on 3D conversions of the Star Wars prequel tales.

The scheduled re-releases of Star Wars: Episode II - Attack of the Clones and Star Wars: Episode III - Revenge of the Sith are being postponed in order to focus company efforts on the forthcoming new instalment of the outer space epic, Lucasfilm said in a statement released Monday.

The company had plans to convert all six existing Star Wars films — the three originals as well as the three subsequent prequel stories — into 3D for theatrical re-release. The announcement came in 2010 amid several high-profile announcements about existing 2D films undergoing conversion into 3D.

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Director J.J Abrams, (centre), seen in December with actors Benedict Cumberbatch (left) and Chris Pine, has already had success rebooting the Star Trek film franchise. (Koji Sasahara/Associated Press)

The 3D-converted Star Wars: Episode I - The Phantom Menace hit theatres in February 2012 and earned $22.4 million US in North America its opening weekend. But overall, 3D re-releases have had mixed results in cinemas, with a few (like animated film The Lion King) successful and others (like The Phantom Menace) considered box office bombs.

Last week, Lucasfilm's parent company Disney confirmed that popular filmmaker J.J. Abrams — who successfully rebooted the Star Trek film franchise — has signed on to direct the forthcoming seventh Star Wars movie instalment. It is set for release in 2014 or 2015.