There are just a few weeks to go until Avengers: Endgame hits cinemas and although not much is known about about how things will end for the band of heroes in the series' final outing, it hasn't stopped fans from speculating.
Writing on Reddit, they say the final scene of the movie references a 'group of extraordinary beings' - the Avengers? - who must come together and harness the power of the infinity stones.
Still none the wiser? Well, let's allow them to explain.
The theory goes: "When they bring the orb to the collector and he tells the first story of the infinity stones I believe we hear in the MCU. One key part is when he says something like 'once a group of extraordinary beings managed to harness the power of the stones and shared the power amongst themselves briefly before they were destroyed'.
"Who would be an extraordinary group of beings? The Avengers. What if in order to undo the effects of the snap, they must gather the stones and truly harness their power to fix whatever Thanos did.
Iron Man adrift in space, in a scene from Avengers: Endgame. Credit: Marvel
"Thor - reality stone (Dark World). Hulk - power stone (obvious reasons). Cap [Captain America] - soul stone (back in time, sacrifice Peggy). Stark [Iron Man] - space stone (how he gets home). Ronin - mind stone (been under the influence). [Black] Widow - time stone (no real reason, defaults).
"Ant-Man becomes extra important because the only way to ensure Thanos can't win is to attempt this power share in the quantum realm so the stones take effect across all times, realities, and existences."
They then go on to list a number of call backs made between the two series - such as a reference to Kevin Bacon made at the end of the first Guardians movie, which is referenced when the Guardians meet Thor for the first time.
A bit of a stretch? Possibly, but it's one of the more plausible theories around, and in truth the only people who know what's going to happen are the good people at Marvel. Funnily enough, we don't expect them to tell us what's on the cards anytime soon.
What we do know for sure, though, is that the new movie is going to make a shed-load of cash.
Last week predictors at Exhibitor Relations said they expect the fourth instalment of the series to make an astonishing $282 million (£212m) on its opening weekend in the United States.
If they're right, this would see it surpass the saga's previous movie, Avengers: Infinity War, which holds the current record for highest grossing film after raking in $258m on its opening weekend last year.
Speaking to Bloomberg, however, senior analyst Jeff Bock did say that it's not a certainty just yet.
He said: "The only thing that could really affect the opening weekend would be a running time that exceeded three hours, which has yet to be confirmed by Disney."
Featured Image Credit: Marvel