The phrase "next instalment" refers to the next part or payment of something that is divided or paid in portions over a period of time. Full definition
Rockstar Games have released 10 new screenshots for Grand Theft Auto V, the highly anticipated next instalment in their blockbuster series. (nextgengamingblog.com)
New Year New Job 2015: Artists, designers, coders, producers and more needed for next instalment of popular RPG shooter series (mcvuk.com)
Square Enix announce next instalment of the iconic franchise will take the form of a origin - retelling prequel (theguardian.com)