We discussed this. I don't have the thread, but here's the quote. It doesn't say anything about replacing the first one. Just that you can only eat one :
Oh man, I'm so excited. Oda just made up for MONTHS of lame SBS with no topic in particular.
Here are some of the highlights
Remember waaaay back last summer when we arrived in W7 and I noted the Italian on the signs? W7 is INDEED based on the 'Water Capitol' Venice AND there's a tide there called the (wait for iiiiiiiiit) Aqua Alta. Oda admits this was his inspiration.
Only ONE person may gain the power of a given Devil Fruit. Once an individual takes even a single bite, the fruit turns into a normal awful-tasting fruit.
The blowfish seen on 38's cover (or rather under the cover) is the real fish which Tom is based on.
Remember the scene with kid Paulie and the Square Sisters? ZAMBAI IS THERE TOO!!!!!!!!!!!!!!!!!!!!! As it turns out, from that moment ALL of them (even the Square Sisters) dreamed of becoming Shipwrights yet only Paulie made it. The Square Sisters got involved with Franky after failing the exam for entering Galley-La. The Franky Family is really a collection of the 'fallen' shipwrights of W7!!!!!!!!!!!!
Favorite Island & Season:
Luffy: Summer….but snow's a lotta fun so...
Zoro: Fall Island's Fall. Easy to move so he can get stronger.
Nami: Spring Island's Summer. For the beach.
Sanji Nami Island's Robin (?!!)
Usopp: Fall Island's Summer. Great weather for making weapons.
Chopper: Winter Island's Spring. Because he's not so fond of very hot places.
Robin: Spring Island's Fall. Good for reading.
Luffy: What the hell, he likes any place if it has meat.
Those two devil fruits are for Spandam and Franky. Spandam will be no match for Franky and will eat a fruit (well, him or his elephant). Franky will be outmatched and steal and eat the other one. He would do a low thing like that just to win a fight. Now, a devil fruit combined with his cyborg powers could be very interesting and make me love Franky a bit more… though I'm still rooting for Paulie!
Fukurou's DF power only measures Rokushiki level. Jyabura might be stronger than Kaku after transforming into some canine. But Kaku more agile. So they're pretty equal to me (besides it's only 20 points difference). Fukurou's DF power is weak, so he will be only fighting using Rokushiki, unlike all the other ones (Kumadori uses a stick and his hair, Kalifa uses her whip, Blueno/Jyabura/Lucci their DF and Kaku his tools). So I think he'll be the first one to fight...
Instead of 1v1 on different places, I'd love to have each time one of the CP9 face the whole group of pirates. Fukurou could measure their hit power and compare them. And each time, one of the SH would stay behind to finish the opponent... like in Saint Seiya or Naruto. This way, we could have many interactions (like Sanji and Karifa before Nami fights her, or our lier Usopp and Fukurou who can't but say the truth before Chopper fights him...).