An explanation has been offered up by the Big N for the release date shuffling.
Nintendo declared that the reason behind the recent delays of Metroid: Other M and Sin & Punishment: Star Successor was due to the high standards for the producers and developers involved, according to a statement given to IGN.
The company said: "As you may know, this game is the product of a unique partnership between longtime Metroid producer Yoshio Sakamoto, Team Ninja, and many other individuals and groups, all of whom have set very high standards for this latest installment in the series. Although it's taking slightly longer than expected to complete the project, we're confident that fans will find it to be well worth the wait."
The other delayed title, Sin & Punishment: Star Successor, was pushed back for a different reason.
"We're striving to provide the best possible pacing for our summer game launches," the statement said. "A June 27 launch allows gamers to enjoy Sin & Punishment: Star Successor without having to rush through Super Mario Galaxy 2."
Super Mario Galaxy 2 launches on May 23. Metroid: Other M is set to launch on August 31. Sin & Punishment: Star Successor will launch on June 27.