Here is the official calendar of events for Nintendo at E3!
6/14 7:40am pt: Live Presentation of New Content for Super Smash Bros. 3DS and Wii U
6/14 2:20am pt: Nintendo Treehouse Live Pre-Show
6/14 3:00am pt: Nintendo World Championships 2015
6/16 9:00am pt: Nintendo Digital Event (this is the one we all have been waiting for!)
6/16 after ^: Nintendo Treehouse Live @ E3
6/17 9:55am pt: Nintendo Treehouse Live @ E3
6/17 4:00pm pt: Nintendo Access — Play Mario Maker @ Best Buy in U.S. and Canada
6/18 9:55am pt: Nintendo Treehouse Live @ E3
6/20 12:00pm pt: Nintendo Access — Play Mario Maker @ Best Buy in U.S. and Canada