I think it makes more sense to do it in terms of number of games needed, rather than number of rounds.
Doubles
32 players means 16 teams.
Round 1: 8 initial bo3 = Min 16, Max 24.
Round 2: 4 winners bracket bo3 and 4 losers bracket bo3 = Min 16, Max 24.
Round 3: 2 winners semis bo3 and 4 losers bracket bo3 matches = Min 12, Max 18.
Round 4: 1 winners finals bo5 and 2 losers brackets bo3 = Min 7, Max 11.
Round 5: 2 losers brackets bo3 = Min 4, Max 6.
Round 6: 1 losers semis bo3 = Min 2, Max 3.
Round 7: 1 losers finals bo5 = Min 3, Max 5.
Round 8: Grand finals bo5 = Min 3, Max 10.
Total number of games: Min 63, Max 101.
This means melee singles will be a 32 man double elimination bracket:
Round 1: 16 initial bo3 = Min 32, Max 48.
Round 2: 8 winners bracket bo3 and 8 losers bracket bo3 = Min 32, Max 48.
Round 3: 4 winners bracket bo3 and 8 losers bracket bo3 = Min 24, Max 36.
Round 4: 2 winners bracket bo3 and 4 losers bracket bo3 = Min 12, Max 18.
Round 5: winners finals bo5 and 4 losers bracket bo3 = Min 11, Max 17.
Round 6: 2 losers bracket bo3 = Min 4, Max 6.
Round 7: 2 losers bracket bo3 = Min 4, Max 6.
Round 8: losers semis bo3 = Min 2, Max 3.
Round 9: losers finals bo5 = Min 3, Max 5.
Round 10: Grand finals bo5 = Min 3, Max 10.
Total number of games: Min 127, Max 197.
Pools
With 32 players, I'll assume 8 pools of 4, with 2 people getting through. This means that the singles brackets will use 16 player double elimination
Singles brackets: 8 Rounds
Assuming each pool does bo3 matches:
Player 1 vs Player 2 = Min 2, Max 3.
Player 1 vs Player 3 = Min 2, Max 3.
Player 1 vs Player 4 = Min 2, Max 3.
Player 2 vs Player 3 = Min 2, Max 3.
Player 2 vs Player 4 = Min 2, Max 3.
Player 3 vs Player 4 = Min 2, Max 3.
So for one pool: Min 12, Max 18.
Hence, for 8 pools: Min 96, Max 144.
Assuming each pool does bo1 matches:
Player 1 vs Player 2 = Min 1, Max 1.
Player 1 vs Player 3 = Min 1, Max 1.
Player 1 vs Player 4 = Min 1, Max 1.
Player 2 vs Player 3 = Min 1, Max 1.
Player 2 vs Player 4 = Min 1, Max 1.
Player 3 vs Player 4 = Min 1, Max 1.
So for one pool: Min 6, Max 6.
Hence, for 8 pools: Min 48, Max 48.
Conclusion
Teams brackets + Singles brackets = Min 190, Max 298.
Singles pools bo3 + Singles brackets = 223, Max 341.
Singles pools bo1 + Singles brackets = 175, Max 245.
That said, I'd rather we do pools. Teams in the UK is a joke, take PH2, a Bowser+DK team came third
EDIT: It's nice to know someone else is doing something useless at this hour of the morning, the number of votes for teams just went up by one.