Crossover TV: The Triumphs and the Pitfalls

There are rumours that Supergirl will be crossing into the Arrow/Flash DC Universe. This article could analyse some TV crossovers and how successful they are. Why do TV makers do them? When do they work best? Is it confusing to those viewers who only watch one of the shows? Some good shows to talk about would be:
Family Guy/American Dad
Simpsons/Futurama
Arrow/The Flash
Bob's Burger's/Archer

Plus looking at some of the 90s shows that started it.

also how about Xfiles / Fringe – wierdbuthatsok 10 years ago
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I think its interesting that all the shows you mentioned above, with the exception of X-Files/Fringe, are all comedies. Are comedy crossovers better accepted by viewers? – Cagney 10 years ago
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Arrow/Flash is not a comedy, I am offended to my soul! Haha, possibly good point though. – Francesca Turauskis 10 years ago
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I think a good idea to bring up would be one show being morning charge than the other,much as when Arrow crossed over into The Flash and the show treated Oliver like the boss in Flash's own show. – Hailtothechimp 10 years ago
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