Does the world really need another "Teenage Mutant Ninja Turtles" film? (@IGN / Twitter)

While some of these films are definite and already have scheduled release dates, others are still floating around in that much-hated state of limbo thanks to the wonderful rumor mill that is the Internet and Hollywood.

Here are 5 (potential) upcoming movie sequels to be on the lookout for.

"The Purge 3"

According to Deadline, a third installment in "The Purge" franchise is currently in the works. James DeMonaco, writer and director of the previous two films, will be returning for "The Purge 3."

Producers slated to return include Sebastian Lemercier, Michael Bay, Brad Fuller, Jason Blum, and Andrew Form.

With most of the team returning to work on this upcoming third film, "The Purge 3" should be able to continue the success that the previous two installments in the franchise have seen at the box office. Worldwide, the first two movies grossed a total of $200 million despite an extremely low combined budget of $12 million.

"Iron Man 4"

"Will he or won't he?" That's what everyone's been asking about Robert Downey, Jr. since his deal with Marvel was extended for "The Avengers: Age of Ultron" and "The Avengers 3," but there was no word on a fourth installment in the extremely successful "Iron Man" franchise.

On October 7, Downey implied that he and Marvel were currently in negotiations for "Iron Man 4" on "The Ellen Degeneres Show." However, Downey has since dialed back on his comments and instead told David Letterman, "There's no plans for an 'Iron Man 4.' There's no script for 'Iron Man 4,' but they do have a plan and I think they're gonna announce it."

"Just between us, no, but I'm gonna do other stuff with Marvel," the actor continued after Letterman pressed him for more info. "I'm still going to be involved with Marvel and there's gonna be plenty of fun stuff to happen."

Co-star Gwyneth Paltrow, who plays Iron Man's love interest Pepper Potts, has also been very lukewarm to the idea of "Iron Man 4."

"The Avengers 3"

Another extremely successful Marvel movie franchise "The Avengers" already has a sequel ("The Avengers: Age of Ultron") slated to come out May 1, 2015, but lately everyone's been talking about the third installment in the franchise instead.

Rumors have been swirling around the Internet that "The Avengers 3," which is tentatively set for a 2018 release, will not include any of the Avengers that we've come to know and love, except for Iron Man (Robert Downey, Jr.).

There have been mixed reactions from fans about these (still unconfirmed) rumors. Some thinking it a smart move on Marvel's part to build up "The Avengers" as an ever-changing roster of characters (which it is in the comics), while others are - of course - firmly attached to the six main Avengers that we were introduced to in the 2012 movie.

Unless we (finally) get that solo Black Widow movie that we deserve, I personally refuse to accept that the original Avengers will no longer be a thing after "Age of Ultron" comes out.

"The Lego Movie 2 & 3"

After an extremely successful worldwide gross of $468 million, it was no surprise that Warner Bros. would sign on for at least one sequel to "The Lego Movie," which has already been scheduled for a May 26, 2017 release.

However, Warner Bros. has also saved two dates in 2018 and 2019, respectively, and The Hollywood Reporter claims that both slots will be for more "Lego"-related films.

Chris McKay, who edited the original film, is set to direct "The Lego Movie 2," while the original producer-director duo of Phil Lord and Christopher Miller will be returning as producers.

"Teenage Mutant Ninja Turtles 2"

With a planned release date of June 3, 2016, "Teenage Mutant Ninja Turtles 2" is looking to replicate the first film's successful run at the box office. Despite being panned by critics ("Teenage Mutant Ninja Turtles" currently holds a 19% Fresh rating on Rotten Tomatoes), the summer blockbuster earned $65 million in its opening weekend (August 8, 2014), taking the number one spot from "Guardians of the Galaxy," which had been dominating the box office up until that week.

So, will "Teenage Mutant Ninja Turtles 2" be successful? Based on the success of the first film and other Michael Bay-related movies, the answer will probably be yes...

But we'll all come out of the theater hating ourselves for subjecting ourselves to yet another terrible Michael Bay film riddled with explosions, objectified women, racial stereotypes, and an obsession with all things related to the military.

Reach Entertainment Producer Michelle Tiu here and follow her on Twitter.