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possible plot structure (potential spoilers)

So based on the available footage and magazine stills I think I'm starting to piece together the plot - which was helpfully provided in the "final" trailer, which definitely isn't gonna be the final trailer anymore - and a possible order in which the plot unfolds.

Just for reference there's this t-shirt with the films locations on it (cuz I'm gonna reference them when I refer to sequences/photos)

They actually filmed in Budapest, Norway and Morocco so I assume the sequences shit in those places will be set in those places. They also shot mostly in London and a little bit in Atlanta so assume those places stood in for Siberia, Ohio and New York.

Alright onto my proposed sequence of events.

Given Ross is here backed by an insane amount of SWAT officers (he's wearing the same suit as the only other shot we have of him so I assume  the twos shots belong to this same scene) and there are shots in the trailers of a SWAT team infiltrating a building - a building that doesn't really match the asthetic of Yelena's Budapest apartment. I'm gonna take a wild stab in the dark and assume this is likely our opening sequence. Ross takes a SWAT team to Natasha's safe house (in either New York or Ohio) and obviously doesn't catch her. But since her safe house and her alias is now burned, she needs a new one and that kicks off the events to follow.

Mason is supposed to be an old flame (or if you listen to O-T's recent interviews it sounding more like an unrequited crush) with connections to Nat's SHIELD days and is now a "fixer". Makes sense he would be able to get Natasha some new ID's and help her disappear/get off Ross' radar. Where's Natasha gonna find Mason?

Norway. It's a setting in the film AND happens to be a filming location where Scarlett and O-T were spotted filming on location - specifically that trailer we see in the "final" trailer. That green shirt we've seen Natasha wearing in a few shots, that's the shirt she was wearing when they were filming on location. You know what else happens in Norway? That bridge fight between Natasha and Taskmaster. Natasha's fighting him alone and it seems to be her first interaction with him in that sequence so it's safe to say that happens before she meets up with Yelena.

Speaking of Yelena - we're moving onto Budapest. Obviously their little reunion starts in a completely normal knock-down-drag-out fight between sisters and ends with the Widows and Taskmaster chasing them through the streets. We've only seen part of this extended chase by the way - there's set photos of the car Natasha and Yelena are in strapped to the tank Taskmaster is in (for stunt safety reasons) with the girls inside and we know they escape so we're missing at least one part of this action set piece.

Obviously they escape the Widows a d Taskmaster which leads then to the conclusion Taskmaster isn't gonna stop chasing them so they need a little help...

... from Alexei. Who happens to be in a prison apparently (that I assume must be in Siberia based on the snow). So Natasha and Yelena out on their white suits and break him out to help them take down Taskmaster and friends. Having just broken out of a prison and apparently started an avalanche or something based on the trailers - the trio seek out Melina for a place to lay low and a fourth set of hands.

I don't think Melina is involved int he prison break sequence because of this pair of photos;