RuneScape 3 was announced today for a Summer 2013 release from Jagex. The game will use a new HTML 5 engine and is built around 12 years of content. According to the developers the game will allow you to carry over previously made characters and promises to have a fully immersive experience.
RuneScape 3 Trailer
http://www.youtube.com/watch?v=5SGTB_A7pd4