The Yogscast team from YouTube, including Lewis and Simon, have been quiet about whether or not they will attend Minecon this year. This has been put to rest by Martyn from the Yogscast. He said in his vlog that he would be the only person from the Yogscast attending the event, and feeling somewhat of a responsibility to present them at the event. The Yogscast includes YouTube gamers Simon & Lewis, Sips & Sjin, and Hannah & Duncan. Last year they even had a panel where the showed off creations by the crew and previewing an episode of Shadow of Israphel.So why aren't they coming this year? It could have something to do with Notch mistakenly claiming the Yogscast of, "repeatedly [insulting] people, talked behind their backs, refused to cooperate, and acted like total spoiled divas nonstop." Notch and the Yogscast both announced later that Notch's accusations were false, and Notch addressed the claims as a result to stress. This could (or could not) be the reason InTheLittleWood will be the only one attending, because Martyn joined the Yogscast after last year's Minecon. So you won't be seeing the happy dwarf this year.
Source: YouTube