The release schedule also helps back this up a little: Ant-Man and the Wasp hits UK cinemas 6 July, Captain Marvel arrives 8 March 2019, and Avengers 4 is out 3 May 2019.
Combine that with the fact Captain Marvel has been heavily hinted to involve a return to the Quantum Realm.
We open on New York City, presumably moments after Thanos finally gets his hands on all the Infinity Stones and unleashes destruction.
And it could very well have something to do with the Quantum Realm, an alternate dimension where space and time are irrelevant.