Well the final trailer is here.
Potential spoilers below:
I think it's clear the other spidermen have been edited out of the scene with the 3 villains on the scaffolding, since Lizard is jumping towards nothing (although it almost looks too obvious that this is the case). Marvel have a history of editing their trailers so, I am pretty sure this is correct. In one of the final shots, it looks like Andrew Garfields glove is going to catch MJ (Tom holland jumps but the glove is a different colour than the suit he is wearing), which makes sense he's the one to save her falling, as redemption for not saving Gwen in the Amazing Spider-Man 2. The red on Doc-Oc is not a redesign, its Peter using Stark tech to shut down the arms and make him docile again. I am hoping they explain why Dr Strange isn't helping in the fights, as they would be over in seconds otherwise. I hope its not just a case of "you have to battle these demons yourself parker", that would be lame..
I went back and watched all the spiderman films over the last couple months in preparation because I am a nerd