It's true that, while awesome, Law's appearance was kind of "where did this guy come from?". I mean: I was expecting Law to be both on Punk Hazard and a Sichibukai. What I found weird was the Master and that goon talking like "the marines? Ok, NO ONE is living here, ok? so we won't show ourselves, not even me. . .", and next page, a freaking Sichibukai opens the door??? It does seem weird.
I'm still trying to make up what's going on in this arc, but so far I'm loving it, a lot. Too much maybe. As last week, this build up is so insanely good that the expectations are sky high right now.
That being said, Law might just be in an alliance with Master. Master looks like the aftermath of an experiment gone terribly wrong, and I really like the idea that someone said before me, that all the weird creatures around the island are also the results of said experiment. C'mon, it was a chemical weapons experiment; if that goes wrong, expect all kinds of weird crap going on.
Hell, I'm horrible at doing theories. I'll just wait and see what happens. Can't next chapter come right now??