"Obviously we had online on other platforms so it wasn't going to be a technology challenge for us," said the game's producer, Shaun Himmerick, to advancedmn.com. "Nintendo didn't have their online system ready for us when we would have needed to implement it," he continued.
Apparently Nintendo have been keeping hold of the online tools for themselves in order to develop their new Mario Strikers game. Ironically, Armageddon will see a UK release after Mario Strikers which goes on sale later this month.
To compensate Himmerick went on to state:
"That is a big reason we focused on giving the single player experience even more attention to perfect the new controls system, the addition of Endurance mode and an additional Kharacter."
The game will be released early June.