Count Olaf may be a horrible person, but even when he says that "he does not speak monkey", he shouldn't burn to death. He should be hung, drawn and quartered grievously by sunny baudelaire.
mr. poe will not appear in the last book, but the baudelaires will return to the village of fowl devotees, as the crows in book 12 couldn't have came from just anywhere.
Also, in the twelth book, there is a HUGE clue that Olaf will not be burned to death. It says that he always borrows a load of matches and suff with him everywhere he goes, so if he arranges the matches so they look like him, he will fake his own death for the 3rd time in the series and because everyone isn't very smart, the people will THINK that he is the amouldering pile of ashes.
(Also, there will be a fourteenth book, because on lemony snicket's website, hidden in the deepest corners of it, it clearly states that there will definately be a fourteenth book. Even a blind mouse could see that!!)
Find it at lemonysnicket.com