Spoiler Alert, i suppose.
I'm a new obsessed fan of one piece, just starting to watch the anime this year and just finished Zou Arc, and something bothered me.
As we see in the map of One piece, laugh tale is in the end of the Grand line right, so it's the nearest island to the other side of the Red Line.
What if when Luffy got there, the island is already destroyed by the world government? as we see in Tequila Wolf, they're already so capable of creating great infrastructure, what if all this time, they've secretly created a land path through the middle of red line, reached laugh tale through there and just destroy it? it's the fastest path to Laugh Tale after all, rather than circling the world through the whole grand line.
The only thing waiting the straw hats are burned down island that was once Laugh Tale.
I mean, if i was Imu, that's what i'd do i suppose.