It could just as easily be a Rooftop chapter. After Luffy's eponymous chapter in 1000, there were 3 intermediary chapters before the next eponymous chapter (Tama: 1004).
Chapters that are focused on the Rooftop are unlikely to be titled after a particular character for now, since the Rooftop isn't making significant progress yet.
The next eponymous chapter would probably be Nami or Jimbe, but it may not be the next chapter.