Shigeru Miyamoto, the original designer of Mario levels, has confirmed during an interview with YouTube personality, I-Justine, that players will be able to share their level creations online with each other in Mario Maker.
When asked about playing other people’s courses, or people playing yours, Miyamoto had this to say:
“You’ll be able to see what happens when other people play your course, or when you play other people’s courses there will be some popularity rankings for the most popular courses. Things like that.”
Mario Maker will allow users to create their own Super Mario Bro. levels by using the touchscreen on the GamePad and is currently set for release in the first half of 2015.
Source: IGN
Crisis averted.