The order would be:
Beowulf sets out on his journey for Daneland.
Hrothgar welcomes Beowulf.
Beowulf waits for Grendel to attack Heorot.
Beowulf succeeds in defeating Grendel by tearing off his arm.
Beowulf fights with Grendel’s mother.
Beowulf sets out for his fight with the dragon.
Beowulf sets out for his Geatish homeland.
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I would say foreshadowing because it says “eventually” which means you’re saying like “fast forward to this event”. It hasn’t happened but your telling what did happen.