This is an error I often encounter: “The movie is more like a spinoff than a full-pledged sequel.”
The correct term is actually full-fledged.
From the New Oxford American dictionary:
completely developed or established; of full status
Example: coldlike symptoms that never quite develop into a full-fledged cold
The term has its roots in the adjective fledged, which means a young bird having wing feathers that are large enough for flight. On a figurative level, the term fledged refers to a person or thing that have just taken on the role specified. Example: Our discipline is so new fledged that the FBI had to take its cases to the Smithsonian for analysis.
Photo credit: KK Mix Pix