It's an open secret Tobey Maguire and Andrew Garfield will be appearing in first Spider-Man: No Way Home trailer. Featuring Tom Holland's Spider-Man and Benedict Cumberbatch's Doctor Strange, this confirms reports the Multiverse would be a major part of the film - and even features the return of Alfred Molina's Doctor Octopus.
The trailer doesn't show everything, though. Previous Spider-Man actors Tobey Maguire and Andrew Garfield are strongly rumored to be associated with the production as well, swinging their way into the MCU as variants of Spider-Man from different timelines. Some actors from Spider-Man: No Way Home have even stopped trying to pretend they're not in it, with Mr. Dell actor JB Smoove excitedly talking about how he'll love to see Tobey Maguire working with Tom Holland. The Spider-Verse team-up really is one of Hollywood's worst kept secrets.
Given this is such an open secret, why didn't the trailer for Spider-Man: No Way Home confirm Maguire and Garfield's different versions of Spider-Man? It's important to this trailer release is literally the beginning of marketing for the film, and as such it achieves exactly what it needs to do; it explores the consequences of Spider-Man's identity reveal at the end of hold shots of Garfield and Maguire back for the second phase of marketing, closer to the release date, when they'll have a greater impact - especially given everybody is expecting them anyway.
In truth, the Spider-Man: No Way Home trailer does indeed confirm the various cinematic universes are intertwining. The power flares it shows are associated with Jamie Foxx's Electro from 2014's new design, unlike Foxx's Electro, which is yet to be seen.
Fans are eager to see the three different big-screen versions of Spider-Man interact, but they'll need to wait a little longer. For now, the focus is purely upon Spider-Man, Doctor Strange, and the crises they face; the real Multiversal potential will only be seen in a second trailer in a couple of months' time, and even then Sony and Marvel would be wise just to include a couple of shots of the three Spider-Men teaming up. This is marketing, after all, and they don't want to give away too much about Spider-Man: No Way Home.