Barely anything has happened so far in One Piece and it has been well over 400 chapters.
Surely at this pace the manga should go on atleast another 1000+ chapters.
I would be so saddened if Oda suddenly kills of all of the Shichibukai in one fell sweep - Or kills off everyone in the last 200 chapters or so. The current pace is PERFECT! Kill a main enemy every 100 chapters or so and we'll be there in no time! Whatever happens - I want OP to go on for MANY years to come.
But then again, if Luffy keeps getting stronger - How can they keep being able to fight him on equal grounds?