The earthquake Japan just suffered has already some repercussions, the most logical being about the anime Tokyo Magintue 8.0 and other animes too, and some video games being delayed/cancelled all-together.
Now, do you think this would change any part of ONE PIECE Oda had already planned?
I know this is the manga so I would like to avoid mentioning the anime but the most obvious resemblance in ONE PIECE would be the Aqua Laguna, I wouldn't be surprised if certain anime stations that air ONE PIECE reruns skip the Aqua Laguna episodes, though I doubt Shueisha will stop printing the chapters pertaining the Aqua Laguna, nor the DVDs of those episodes stop being printed.
An important thing to mention is the current arc, since the crew is underwater and all that, the whole "Prophecy of destruction" leads me to believe it very well would have to be some kind of Tsunami or something catastrophical, and If that was the case, more probably than not it won´t be anymore and Oda will have to change it.
And finally the striking obvious, the Gura Gura No Mi and his owner, Blackbeard the Big Bad Guy of ONE PIECE, which btw has the power to make.. EARTHQUAKES!! This is an unavoidable truth, its not like that can be changed plot-wise, It would be unnatural if Blackbeard didn´t use the Gura Gura No Mi powers when he reappers, and I think Oda already had planned what he wanted to do for the ending, imagine the whole world in peril or something like that, something Oda and just Oda can pull ;)
And now that ending is probably gonna be changed.. Even if 10 or so years pass, just look at CLAMP´s X…