How is listing previous locations for Minecon an indicator of where a future Minecon will be? That is just simply using a pattern to guess that kind of probability and patterns do not always reoccur. Also your 2010 location is incorrect. There was no official Minecon in 2010, but a group of about 50 fans did an impromptu gathering and dubbed it "MinecraftCon 2010" This was in Bellvue, Washington (USA) NOT Sweden.
They threads are useless, because people always ask for it to be close to where they live. I live in Toronto, Canada, but I think it should be in Australia, because it has a big Minecraft community and has never been there.