At the end of TMP, our heroes celebrate what they feel is the birth of a new lifeform, that has reached a new level of consciousness as a result of bonding with Decker.
A darkly humorous alternate interpretation: V'ger, desperately seeking meaning in its existence, bonds with its 'creator'. It discovers that our lives are as meaningless as its own, and self-destructs in a suicidal flash of existentialism.
Alternately, I suppose it could've become a Q/Prophet/Organian-like creature.
A darkly humorous alternate interpretation: V'ger, desperately seeking meaning in its existence, bonds with its 'creator'. It discovers that our lives are as meaningless as its own, and self-destructs in a suicidal flash of existentialism.

Alternately, I suppose it could've become a Q/Prophet/Organian-like creature.