The knowledge and act of returning back from the dead as a fictional character. This means both the knowledge as a viewer that the character MUST come back from the dead, and the act of the character returning from the dead.
Noted in CinemaSins.
Referring to how Olaf returned from the dead in Frozen 2.
"I wanted to believe Disney is brave enough to veer from its format and kill a character permanently, but this moment has 'Olafication' written all over it.
ah-live-eh-ka-shon
-Noun
1. An inflated feeling of pride in your superiority to others ego, egotism pride, pridefulness - a feeling of self-respect and personal worth that no one else has.
2. An exaggerated opinion of your own importance egotism, swelled head conceitedness, vanity, conceit - the trait of being unduly vain and conceited; false pride superiority complex - an exaggerated estimate of your own value and importance.
3. The use of device(s) (i.e. speakerphone)in a deliberate attempt to sound more important than you actually are.
When the new boss arrived, John put all calls on the speakerphone and began to speak loudly enough for all to hear and implied his superiority over the rest of the office. Later, it was realized that he suffered from Olivication.