User blog comment:Pandawarrior/What if Luffy and the SHs had joined the Whitebeard Pirates?/@comment-4493594-20111201095345

Since Luffy promised Vivi to beat Crocodile, Ace would have tagged along and kicked his ass after Luffy's defeat. But the rebellion still would have happened and the royal soldiers and rebels would have killed each other since Vivi was not there to stop them.

After the fall of Alabasta Kingdom Vivi would have become an official member of the SHs and together they would have joined WB. Luffy would have argued with the old man about letting him do his thing and WB would have kicked them out. Luffy would have promised to kick his ass one of these days.

In the meantime Franky gets caught by the CP9, Spandam gets the blueprints for Pluton, takes over the WG, becomes a member of the gorosei and marries Shalulia.

Brook would be stuck in the Florian Triangle forever and nobody would ever come to listen to his lame puns. Not that he'd care.