Minecon is an annual event held by Mojang, the creators of Minecraft and Scrolls. The event is to celebrate the fandom of Minecraft.
This summer Minecon is heading to London, UK. This event will be home to 10,000 fans over the span of 2 days this summer. There will be panels, contests, tournaments, events and a "soon-to-be-announced show-of-some-sort".
The event will be held on July 4-5, 2015 in ExCeL London Exhibition and Conference Centre. Mojang have put together a Q&A on their page that you can view here. Check it out for the answers to your questions!
See you at Minecon.