I'll stir the pot a little: Chart of items/enemies/obstacles etc. NOT included in Mario Maker.
http://www.destructo...er-309123.phtml
https://i.imgur.com/eDoFVeM.jpg (Full size image of chart)
A crap ton of things from Super Mario Bros. 3 and Super Mario World aren't included, and those 2 games are probably the most popular and most loved games in the entire Mario Bros. catalog (3rd best very obviously being Super Mario Sunshine).
They just can't be bothered to ever bring back the hammer suit, can they?