This is assuming Roger isn't completely retarded and turn himself in with his beloved blade.
Back in the day people theorized that Koby would get the mera mera no mi cause he's basically Garps grandson at this point. Obviously Sabo got it but there's the next best thing: the sword!
Garp definitely has the sword since Rouge would have had it but she died. I bet he was planning on giving it to Ace when he became a great marine and that plan failed miserably.
Now that Koby is after the one piece and is the future of the marines it's fitting he uses the PKs sword entrusted to him by Garp. That way he can name his future son after it as well
Back in the day people theorized that Koby would get the mera mera no mi cause he's basically Garps grandson at this point. Obviously Sabo got it but there's the next best thing: the sword!
Garp definitely has the sword since Rouge would have had it but she died. I bet he was planning on giving it to Ace when he became a great marine and that plan failed miserably.
Now that Koby is after the one piece and is the future of the marines it's fitting he uses the PKs sword entrusted to him by Garp. That way he can name his future son after it as well