sequel

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Something that follows as a continuation, especially a literary, dramatic, or cinematic work whose narrative continues that of a preexisting work.
• noun A result or consequence.

from The Century Dictionary.

• noun That which follows and forms a continuation; a succeeding part: as, the sequel of a man's adventures or history.
• noun Consequence; result; event.
• noun Consequence inferred; consequentialness.
• noun Succession; order.
• noun Those who follow or come after; descendants.
• noun In Scots law. See thirlage.

from the GNU version of the Collaborative International Dictionary of English.

• noun That which follows; a succeeding part; continuation.
• noun Consequence; event; effect; result.
• noun rare Conclusion; inference.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun narratology A narrative that is written after another narrative set in the same universe, especially a narrative that is chronologically set after its predecessors, or (perhaps improper usage) any narrative that has a preceding narrative of its own.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a part added to a book or play that continues and extends it
• noun something that follows something else