It appears as if a batch of images from the Spider-Man: Homecoming trailer have leaked online, or another posibility would be from Spider-Man: Homecoming footage that is supposed to be released Friday at the Brazil Comic-Con (which may or may not be the trailer).
It's speculated the Spider-Man: Homecoming trailer will be released with the December 16th premiere of Star Wars: Rogue One.
The leaked Spider-man: Homecoming images feature Tom Holland as Peter Parker as well as Spidey. See below.
"Spider-Man: Homecoming" has a July 7, 2017 release directed by Jon Watts starring Tom Holland, Zendaya, Michael Keaton, Donald Glover, Jacob Batalon, Laura Harrier, Tony Revolori, Tyne Daly, Bokeem Woodbine, with Marisa Tomei, and Robert Downey Jr.
Synopsis:
A young Peter Parker/Spider-Man (Tom Holland), who made his sensational debut in Marvel Studios' "Captain: Civil War," begins to navigate his newfound identity as the web-slinging superhero in "Spider-Man: Homecoming."