Sometimes, creators feel the need to stress to the audience that a work is part of an indefinite ongoing series, in order to make sure that they look for the next installment. A particularly unsubtle version of this is to simply announce it in an out-of-universe caption instead of "The End". The traditional format is some variation of "[HERO'S NAME] will return".
Sometimes this can be the sad sign that a work was intended to launch a Stillborn Franchise.
Not to be confused with And the Adventure Continues, which is where the intended final installment of a work doesn't have a permanent ending, but suggests that the characters will continue adventuring into the future, or with I Shall Return, which is a character saying this in story as a promise or threat. See also To Be Continued for more serialised works, and Sequel Hook for an intentionally conspicuous plot loose end that could provide the seed for a sequel.
- In Alarm Clock, the author's note on the final chapter ends with "Ditzy Doo and Doctor Hooves will return..."
- The Trope Codifier is the James Bond films, all of which end with a caption "James Bond will return in [TITLE OF NEXT FILM]" when the title of the next film is known, or simply "James Bond will return" when it isn't. Sometimes they changed their minds, for example when The Spy Who Loved Me announced that For Your Eyes Only would be the next film, when Moonraker came between.
- The Marvel Cinematic Universe has several, both before and after its first big crossover.
- Thor does this just before The Stinger - "Thor will return in The Avengers."
- Iron Man 3 ended with a "Tony Stark will return" caption, to explain to the audience that the film's ending with Tony seemingly retiring permanently from superheroing wouldn't stick (but keeping a bit of ambiguity about whether Iron Man would be seen again), and that Tony-only fans should still go and see Avengers: Age of Ultron.
- Captain America: Civil War ends with a "Spider-Man will return" to explain that Spidey will get his own film.
- Thor: Ragnarok and Black Panther both state that the titular hero will return in Avengers: Infinity War.
- Avengers: Infinity War ends with a "Thanos will return" caption, lampshading the film's The Bad Guy Wins ending.
- Ant-Man and the Wasp, which ends on a Sudden Downer Ending, ends this caption with an uncertain question mark.
- Captain Marvel ends with "Captain Marvel will return in Avengers: Endgame", though this time it's after the mid-credits scene rather than after the credits.
- Some The View Askewniverse films parody this with a "Jay and Silent Bob will return" caption, referring to two characters who are usually recurring minor ones.
- The 1975 Doc Savage film ended with a "Doc will return in Doc Savage: The Arch Enemy of Evil" caption. Unfortunately, due to the film's poor commercial and critical response, this hasn't happened yet.
- The Adventures of Buckaroo Banzai Across the 8th Dimension ended with the announcement that he would return in Buckaroo Banzai Against the World Crime League. The movie wasn't a success, so he didn't.
- Machete ends with the narrator claiming "Machete will return in "Machete Kills" and "Machete Kills Again" ". When Machete Kills was released, the third film's name changed to to "Machete Kills Again... IN SPACE!".
- The 1960's Matt Helm film series. At the end of the last film, The Wrecking Crew, the caption says "Matt Helm will return in The Ravagers". The Ravagers would have been the fifth Matt Helm film, but it was never made.
- Parodied by Doctor Detroit, whose end credits proclaim that Doctor Detroit will return in Doctor Detroit II: The Wrath of Mom.
- Maradonia and the Shadow Empire, the film adaptation of the first Maradonia Saga book, ends with a caption promising a sequel titled Maradonia and the Escape from the Underworld. It seems to be a Stillborn Franchise.
- Twenty-first century Doctor Who has occasionally done this for mid-season hiatuses and season endings, such as "A Good Man Goes to War" ending with a caption reading "Doctor Who will return in Let's Kill Hitler".
- The epilogue of Henry IV, Part 2 promises a continuation "with Sir John in it". In the event, Shakespeare either changed his mind (according to one theory, after receiving complaints from the descendants of the historical Sir John Fastolf over how their ancestor was depicted) or was trolling the audience, as Falstaff dies off-stage in Henry V without ever appearing.
- Parodied on the Hercules: The Animated Series episode "Hercules and the Golden Touch", as part of its James Bond homage, where the narration teases a non-existent sequel.
Icarus: Hercules will return in From Sparta with Love.
- Although it wasn't in the episode proper, the credits during the premier of the Steven Universe episode "A Single Pale Rose" (a Wham Episode that ended on a Cliffhanger) had a short preview from the next episode, followed by a caption of "Steven Universe will return." For context, this season had many long breaks between episodes without any idea when they would resume.
TV Tropes will return in... Revenge of the Sequel!