It will be just luffy, Dorry and Broggy, Ancient Robot and perhaps sanji and zoro
No, I don't think all the Gorosei are foing to fight Luffy... This is an stupid move.
They need to divide into groups (they even can communicate through telepathy, it's perfect).
So, one group will fight Luffy a d the other try to destroy the broadcast.
And, if I had to guess about groups...
Nusjuro and Ju Peter vs Luffy
Saturn, and Mars to the broadcast
Walcury will do the side quests (remember they wanted to pick up York, Mother Flame and destroy and kill Punk Records and Vegapunk)
So, there are 3 main points currently.
- Broadcast
- Kill Vegapunk/Punk Records
- Retrieve Mother Flame
Remember that this fight will not be a full one but a necessary one for the broadcast.