Here is a collection of Minecon 2015 information. We can add to this as the convention progresses throughout the weekend.
Minecon broke a Guinness World record for the largest attendance of a convention for one game with over 10,000 tickets sold.
Some information and trailer was released for the joint game venture with Tell Tale Games: Minecraft Story Mode.
Videos were shown of new features coming to snapshots very soon including a completely new End which will be a new world similar to the Nether and will now have new plants, buildings, and a new mob the Shullker (Shell-Lurker) which shoots Player seeking projectiles that was cause levitation in the End.
Twitch Past Broadcasts:
Show starts at 48:20 on the first clip
Day 2 ~ July 5th
Show starts at 27:45