The news was first reported by TrailerTrack who made an announcement via its social media pages.
Suicide Squad, which is released across the globe this Friday (5 August), is one of the summer's most anticipated films so it's no surprise that this is the film the teaser's been attached to.
David Ayer's new film, focused on a ragtag bunch of supervillains, is rumoured to feature a cameo from Ben Affleck's Batman - ironic considering Nolan is the man behind the popular Dark Knight trilogy he kickstarted with Batman Begins in 2005.
Dunkirk will focus on Operation Dynamo, a British military operation that saw 330,000 Allied soldiers rescued from detainment. The film stars Tom Hardy, Kenneth Branagh and Mark Rylance alongside a string of young actors led by Fionn Whitehead.
Cillian Murphy and One Direction singer Harry Styles will also appear.
Since Memento launched Nolan onto the scene in 2000, he has directed numerous acclaimed films including The Prestige (2006) and Inception (2010). Dunkirk will be the British-American filmmaker's first since sci-fi Interstellar (2014) which starred Matthew McConaughey and Jessica Chastain.
Dunkirk will be released on 21 July 2017.
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