@Ivotas:
That's not a dumb theory at all.
Should I mention that there is actually a difference between theories and predictions?
Theories are explanations of evidence that can be used to make predictions. While predictions tell you what will happen, theories tell you the pattern that predictions can be based on. So something like "Usopp will come back with some special armor" would be a prediction while "Usopp's upgrades keep making him more like Iron-Man" would be a theory that would allow someone to predict that Usopp's next upgrade would make him more like Iron-Man.
When you see the sequence "1, 1, 2, 3, 5, 8, 13, 21, X" and are told to find "X", "34" would be the prediction while "each number in the sequence is the two previous numbers added together" would be the theory that prediction would be based on.
Sorry about that. It has become a bit of a pet peeve that comes from people trying to discredit science by saying that something is a "theory, not a fact". Some of them will even go so far as to say that whether or not something is true depends on their book agreeing with it rather than whether or not reality itself agrees with it. Sorry, I might have gotten a little carried away there.
I'd better make a dumb prediction so that this post has something more on topic in it. Oh, I know.
Luffy will find a devil fruit tree sapling growing somewhere in Impel Down.