User blog comment:Neko Neko no Mi Model: Russian Blue/The potential merits of a Time-Time fruit, particularly one held by an Admiral/@comment-35359957-20180528085533

I think that a devil fruit that alters time in some regard is very possible, as similar powers have already been demonstrated. It would also fit with the theme the new admirals have been presenting. Fujitora seems to have power over gravity, so an admiral with some control over time would make sense. But a devil fruit that allows actual time travel and/or unadulterated time manipulation would be too much. At that point, you're more of a God than a person. Oda may allow some extraordinary power, but that doesn't feel like the kind of power that he would incorporate into his story.