It is not uncommon for the league's administration members to change the formula during the league itself, hence no team got relegated last season and we have again 12 participants just like past seasons, including the two finalists in the second division.
The 12 teams are:
Marek Union-Ivkoni (Dupnitsa)
Dobrudzha 07 (Dobrich)
CSKA (Sofia)
Levski Ball (Sofia)
Neftochimik 2010 (Burgas)
Arda (Kardzhali)
Minyor (Pernik)
Montana (Montana)
Pirin (Razlog)
Teteven Volley (Teteven)
Slavia (Sofia)
Cherno more (Varna)
Only partial rosters are known, the rest is a mystery as usual. I will try to update the rosters list until it is complete.