I love how people complain that Shai doesn't look like classic MJ, but don't batter an eyelash when it comes to the Ultiamte approach to Electro and Rhino. Love it.
The difference is this... The villains are most often seen in one flick and then we move on. Yes, if my whole Sinister Six concept pans out these villains (at least some) will be seen again, but generally villains are temporary, while main characters last...
More specifically to this fanchise, here is the difference:
Classic Electro is very campy as far as his costume. The whole pentagram electric bolt headress is, when you think about it, a bit bizaar. Worked pretty good for the comic, but on the big screen is would have been a joke. Now the Jamie Fox, blueish, with energy coursing through, will look really cool on screen, I think and from what has been shown so far. I still find it funny that when I made a joke a few months ago about him being some cross species thing with electric eels that it turned out to be, at least somewhat, correct. But generally I think his look is going to come off really good on screen.
Rhino is really a six of one, half a dozen of the other thing. I don't think it really matters 616 or ultimate. Whether it is radiation and chemical treatments with a permanently bonded armor = 616, or a stolen military suit = ultimate, or even if it turns out to be some cross species thing, it really doesn't matter. As long as he looks cool, has some form of armor or hide, with some form of horn at the top of his head, we're good.
But MJ (and Gwen) (and Spider-man) are very different. Once you choose to make one of these 616, which they have, then you are almost forced to go that route for the others. You can't have the girl next door Gwen and then the girl next door MJ. You can't have the book worm Gwen and then the book worm MJ. You need to have contrast and since they have already gone with 616 Gwen then they need to go with 616 MJ. Raimi's MJ was not done very well. We really need an out of Peter's league MJ with a heart of gold. She needs to be, and I know I'll get flamed for this, a drop dead amazingly gorgious bikini model or better yes, Victoria's Secret model, that some how Peter ended up with. Someone that the audience will be excited about Peter ending up with, which means her personality has to be fun, adventurous, and intelligent, not some bimbo. In a lot of ways the problem is Emma. She is so good that she causes all others to be compared to her and come up wanting. Again, you need contrast or the comparisons will become a problem.
One thing that bothers me is that at a minimum there should have been a cameo of MJ in TASM2. I'm not talking about a bunch of scenes with MJ and definitely not her working at some diner (stupid), but how about Gwen poking through some magazine and pointing out to Peter her high school or childhood friend who made the big time, who is now a NY model. Just a picture in a magazing or the actual actress (Alexis Knapp please) who will be MJ.