Just received this from my highly placed contact at ABC. We should get full confirmation later today when ABC should be announcing their upcoming schedules.
There is a natural break in the story at the end of episode 6. But there are 8 episodes in the can, and those last two start a new arc and don't really stand alone. So.......some PTB at ABC don't want to show those last two. At all -- until fall or NEXT Feb. when/if there are more episodes to go with them. But other powers in the Disney pack are strongly pushing for all 8 episodes this Feb, because they are so desperate for original content to be aired. But right now, there is nothing to follow # 8, not planned, not written, nuttin'.
Source: DarkUFO