This speculation-strong to a degree-was based on how the Marvel Cinematic Universe (MCU) has been following a linear timeline.
Following the release of the trailer, Marvel Studios has released a batch of high-res Ant-Man and the Wasp images. Now, it looks like that brief tease will officially play a big role in the upcoming "Ant-Man and The Wasp" film, where the latter will have a significant presence alongside Paul Rudd's character, Scott Lang, a.k.a. Ant-Man.
In the aftermath of Captain America: Civil War, Scott Lang (Paul Rudd) grapples with the consequences of his choices as both a Super Hero and a father.
The music in the trailer did jar slightly with what we're used to from Marvel, but now it makes ideal sense as to why it was included. She responds, "I guess we'll never know, but [if I had been there], you'd have never been caught".
Though we already have a good idea of what Ant-Man and the Wasp look like, the film gives us our first glimpse of the villain called The Ghost.
Besides that, we also get some fun uses of the Pym Particles, including Hank Pym shrinking an entire building-which is apparently a stroller bag-and the Wasp chucking a giant Hello Kitty Pez dispenser at some bad guys. This certainly tops the tank keychain growing into an actual tank from the first "Ant-Man". "You've got Captain America and the Falcon, obviously". While the guitar riff heard in the trailer wasn't exactly hidden, it wasn't given too much thought until now, as director Peyton Reed has confirmed it's a very clever Easter egg.
The Wasp's suit has so many more weapons at its disposal like wings and blasters.
Whether Ghost will play it straight or be a wise-cracking villain is anyone's guess until the film (or more footage) is released, but one thing seems certain-the high-tech duo of Wasp and Ant-Man appear to have met their match in the science department, in a match-up that promises to pit size against stealth.