This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. A literary, dramatic, or cinematic work whose narrative takes place before that of a preexisting work or a sequel.

n. In a series of works, an installment that is set chronologically before its predecessor, especially the original narrative or (perhaps improper usage) any narrative work with at least one sequel.

"I happen to think that the prequel is a great ideal, just because Will Smith, will be in it."

sequel   

sequel    midquel   

isight    kombat    one!    made-for-tv    virtuality