did they ever foreshadow any events?
Yes, they foreshadowed Trump being the  President of the United States at one time and leaving the nation broke.
The Simpsons
 Perhaps the most famous example comes from the episode "Bart to the Future", which mentions billionaire Donald Trump having been President of the United States at one time and leaving the nation broke. The episode first aired in 2000, sixteen years before Trump was elected. 
what is kang and kodos? They are a duo of fictional recurring characters in the animated television series "The Simpsons" who created them? The idea came from Jay Kogen and Wallace Wolodarsky. what reviews did they receive? Several of the "Treehouse of Horror" episodes featuring the duo have been well received. did they also appear anywhere else? They have appeared in several different "The Simpsons" video games was the original series featuring these characters banned ever? The show has reportedly been taken off the air in several countries. which controversies was the series embroiled in? In schools, educators claimed that Bart was a "threat to learning" because of his "underachiever and proud of it" attitude and negative attitude regarding his education. is there anything noteworthy about their halloween episodes? These pieces usually involve the family in some horror, science fiction, or supernatural setting and often parody or pay homage to a famous piece of work in those genres
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The Simpsons [SEP] Foreshadowing of actual events
"The Simpsons" has gained notoriety for jokes that eventually became reality. Perhaps the most famous example comes from the episode "Bart to the Future", which mentions billionaire Donald Trump having been President of the United States at one time and leaving the nation broke. The episode first aired in 2000, sixteen years before Trump was elected. Another episode, "When You Dish Upon a Star", lampooned 20th Century Fox as a division of The Walt Disney Company. Nineteen years later, Disney purchased Fox. Other examples of "The Simpsons" predicting the future include the introduction of the Smartwatch, video chat services, autocorrection technology, and Lady Gaga's acrobatic performance at the Super Bowl LI halftime show.