Hmm, let's see some history.
Season 27 (current) - 11 NBBA teams, 2 matchups
Season 26 - 11 NBBA teams, 2 matchups
Season 25 - 8 teams, 0 matchups
Season 24 - 10 teams, 1 matchup
Season 23 - 9 teams, 0 matchups
Season 22 - 14 teams, 1 matchup
Season 21 - 11 teams, 1 matchup
Season 20 - 11 teams, 1 matchup
Season 19 - 13 teams, 0 matchups
Season 18 - 11 teams, 1 matchup
Past 10 seasons, and the last two have been the unluckiest.