What are three examples of foreshadowing that hint that Odysseus would have problems with the Cyclops in The Odyssey?
When looking at foreshadowing in The Odyssey, one thing to be aware of is the overall structure of The Odyssey as an epic poem. It begins in the middle of the story, long after the Cyclops episode has taken place. Odysseus's encounter with Polyphemus has already happened and is long past, even as it has yet to be recounted in the narrative itself. A significant portion of The Odyssey involves Odysseus recounting his tale to the Phaecians, who offer him hospitality when he washes up on their shores. This structure allows future events to be alluded to quite boldly, in ways which would be much more difficult to achieve had it followed a more conventional story structure, running linearly from beginning to end.
The Odyssey begins while Odysseus is trapped by Calypso, towards the end of his many wanderings, and while Odysseus languishes in the nymph's keeping, we see the gods discussing what to do about him. There, Zeus mentions the following, in response to Athena (Odysseus's chief advocate among the Olympians):
Now, how on earth could I forget Odysseus? . . . No, it's the Earth-Shaker, Poseidon, unappeased, forever fuming against him for the Cyclops whose giant eye he blinded: godlike Polyphemus, towering over all the Cyclops' clans in power. (Fagles, Book 1, lines 77-84).
This is in the very beginning of The Odyssey, and already we have some sense of the wrath that Odysseus has engendered from Poseidon, and the reason for it.
Later, as we are introduced to the Phaecians themselves, we learn more about the Cyclops collectively. As the poem tells us:
years ago they lived in a land of spacious dancing-circles, Hyperia, all too close to the overbearing Cyclops, stronger, violent brutes who harried them without end.
(Fagles, Book 6, lines 4-7) Already, we know that Odysseus had blinded a Cyclops and earned the enmity of the god of the sea, now we have more of an idea of the kind of people Polyphemus belonged to, and can form additional expectations as to the nature of this encounter, one that still has yet to be revealed to us. Finally we witness Odysseus announcing his identity to his rescuers, and begin reciting the various adventures and hardships that had brought him before them: only then do we visit Odysseus's encounter with the Cyclops. (Fagles, Book 9).
In his account, Odysseus frames the episode thusly:
From there we sailed on . . . and reached the land of the high and mighty Cyclops, lawless brutes, who trust so to the everlasting gods they never plant with their own hands or plow the soil. . . . They have no meeting place for council, no laws either, . . . each a law to himself, ruling his wives and children, not a care in the world for any neighbor. (Fagles, Book 9, lines 118-128)
Now we know that they are lawless, part of a culture which exists outside the bounds and rules of civilization (which is a common theme in The Odyssey). Even though he is only beginning this part of the story, between what we know already and what he's just told us, we can already infer much about the opponent he is about to face, that this is someone both hostile and powerful, and we already have some idea as to the way this encounter will end (and what this resolution will mean for Odysseus going forwards). All this and we have yet to meet Polyphemus himself.
Note: The following translation was used in preparing this response: Homer, The Odyssey. Translated by Robert Fagles. New York: Viking Penguin, 1996.