The reason it looks like it comes rom the same place as Guardians of the Galaxy IS because it's from the same Marvel Universe.Thats the whole point.
And, unless people have forgotten ,its all designed to progress that way so ALL these characters are introduced into the final act(s) that culminates in the two part "Infinity War".
I watched this trailer ten times in a row and I am just thrilled by it. Marvel IS the franchise that just keeps delivering as far as I'm concerned. Never have I watched so many films that are often not only hugely satisfying and fun in their own right, but as a continuation of multiple story arcs of characters and stories is truely a "marvel" in cinema history.
They are not only often superbly judged, cleverly constructed, well paced , and wonderfully scripted , but the casting has been almost always universally brilliantly. For example Kate Blanchett in this trailer is perfect. With a very large "P". Put together with the superb consistency and joyfully imaginative scope of the art design and the spectacular effects work that not only often pays a direct and dedicated homage to the comics ,they then take it up another several levels! I cannot really express just how much I love these damn films.
Watching that trailer all I felt was a thrill of happieness!!!! (And think "Well theres at least another billion in the bank at the box office minimium).