>trilogy
>1st entry has well-written protagonist and unique plot with an ending that is somewhat open for a sequel
>2nd entry has a distinctly different protagonist, but still decently written. Protagonist is somehow related to original protagonist through blood or story events; plot is decently written, ending is a cliffhanger
>3rd entry is inevitable team up of the protagonists from both prior entries with a plot straight out of Hollywood C-tier action film