The rolling initial tower cab class review where they keep adding students to is about a 6 week long course. So when you finish the 2 week online tower cab course (which is something new that I didn't have to do) and the 6 week virtual initial tower cab course, you go into the rolling class and review the material on repeat until you get your welcome letter. When I first joined the rolling class there were about 45 students in total waiting for an academy date. Just last week there were 18 left and we just had a new class join this week.
I've heard the rumor about them adding more classes but never heard the exact month when they were going to start that. Is it instructors that are telling you this? It looks like they added more dates for Jan and March so just figured they were waiting until the new year.