Markus was never involved in Scrolls development. Markus had been good friends with Jahkob (Mojang co-founder) for many years prior to Minecraft, Jahkob had been playing with an idea for a long time that Markus liked (what has eventually become Scrolls) and Mojang was formed, in part, to back Scrolls. Markus was never going to develop Scrolls; it was Jahkob's project and he formed a team to build it. Scrolls has become a full game that is being constantly developed, you can buy it now: http://scrolls.com