Hard to accept Electro as the main villain in this.  I like that they want to go that way and Jamie Foxx is an interesting choice.  I'm interested to see where they go with this.

 Well i'm sure Electro is the main but as with the end of the first there is someone pulling the strings still.  I'm guessing we see a Norman Osbourn cameo at the very end as the puppet master.  

Here's a thought. What if Paul Giamantti is Norman Osborne?

It was said I think that Paul Giamantti is the Rhino...

 Amazing Spider-Man 2?  I suppose that okay, but I would've liked maybe "The Specatular Spider-Man" or something to avoid the cliche and generic "2" title.

 Or "Here Comes The Amazing Spider-man!"

redhairs they're saving Spectacular for the 2nd reboot and Ultimate for the 3rd ;)

Giamatti just doesn't have the physique I associate with any Spidey villain except maybe Dr Octopus who always seems a bit pudgy. Maybe the Tinkerer

Son of the Amazingly Spectacular Web-slinging Spider-Man: The Ultimate Sequel

Ah for shits sakes, just give the rights back to Marvel.  This shit is just a mess.  Giamantti as Rhino is just a joke. Rhino in the comics is 7 feet tall. Giamantti is 5'9" WTF? At Hemsworth was close to Thor. Giamantti is not even close. How lame is that? He is great actor but that is not enough to be Rhino.

I can see Foxx as Electro way before Giamantti as Rhino.  But I guess that are setting up the Sinister Six.  I just wish that they had gotten someone who is huge and itimidating like Conan Stevens.  he would have made a great Rhino.

 "The Amazing Spiderman Rises"