"G.I. Joe 2" Being Held Back For Nearly A Year!

A studio exec over at Paramount have confirmed that the new "G.I. Joe" sequel has been held back a year because of the studio wanting it converted into 3D. The film was originally set for a June 29th, but now it's moved to March 29th 2013.
There's a rumor that the studio are also wanting to do some re-shoots on certain scenes. Is the new film in trouble before it's even released?