The AP preview has not been officially announced yet. There are several rumors though when it might be. They range from the last week in January till the middle of April.
when we went the cm who was working at Tarzan Rocks told my mom they would start in January but it was cool cuz when we went they were testing the track with sand bags in the seats of where the people should be and you could hear a yetti screaming or roaring it looks awesome from how it works on the track