A2-B1 Exam is now made by g.a.s.t. They take still the same topics, as telc earlier. All topics, I could collect, are here, in these two post. This is real exams topics, that people shared. That is pretty much and it is very possible, that you will receive a similar task, because niveau A2 and B1 is everyday speech.
What new can g.a.s.t. or Telc invent, I cannot say. But if you find in Internet or hear on the courses something new, you can write me and I answer, what you can talk about it.

Good luck by exam!