@Jetah once we decided to postpone the campaign, we started preparing and recording new material, got new marketing campaigns running, and plenty more. There's really a lot going on behind the scenes which is not directly related to the Kickstarter page / video.
Anyway, the biggest reason we decided not to publish Tartaros is that we really don't have much to show there. We've made it clear since November that our focus for Alpha 1 is Syndesia, and we suffered some unexpected backlash when we released the Arboreus clip and some people were expecting more spells / equip variety / etc. Hence it's better to just have the Tartaros content in the KS video and that's it.