Now, I'm not saying that I dislike everything about this new Joker. The supposed "no fingerprints, no identification", I love that, because it helps keep him anonymous. I like how they want him to be creepier. Is the reason he's creepier because of all these other changes? Hell no. The reason he's creepier is because of the tone they're using. You can be faithful to a character 100% and still mess it up by having a ridiculous tone, like if you have the true Joker from the comics and you put him in a comedy rather than an action drama. However, to me, they're changing way too much and they don't even have a reason to.
So far, Scarecrow and Ra's have been changed, yes, but how?
Scarecrow: The only big difference with him was costume-wise, and the reason was because him wearing a huge straw Scarecrow costume would look a little odd (however, I wish they could've had something a little more Scarecrow-like, or made it so when someone was under the gas, he looked more like a typical Scarecrow, but I can't justify a guy running around with a straw mask and a big red sweater and so forth like a typical scarecrow in the real world would be)
Ra's al Ghul: Rather than being a man who dips himself into magical Lazarus pits that make him immortal, they made it so he's immortal in the sense that he's a legacy name with the same ideas being passed down. Was he different enough that fans could ***** about it? Yes, in my opinion. Why am I not complaining about it? Because Ra's al Ghul is leagues behind the Joker in terms of popularity, memorability, and standing in regards to his purpose in the Batman saga.
The Joker is one of the most well known, if not THE MOST well known, of all comic book villains in history. Everyone who has the slightest bit of knowledge in regards to superheroes knows about the Joker. Do they know about Ra's? No. Do they know about Ventriloquist? No.
SelinaandBruce made a good point earlier about the argument that "its the spirit of the character that matters and everything else is just extra detail". You could use lots of different examples to show how that doesn't fit. Would you like an Asian Magneto wearing pink? Or if they introduced Robin in the series, would you be fine with it if he was still "the Grayson kid that lost his circus parents", but they made him wear all purple and he had long blonde hair? Obviously, getting the character's intentions and purpose is the main root of what you need, but if you go against the other details, you flat out don't have the same character. In regards to "if you just had the same old, you'd be bored".....what??? Lol. I'd completely agree with you if we were talking about doing a complete remake of 89 Batman, because we've seen that, or even if we had "a Batman and Joker movie every other year" or something, but look what we've had with the Joker outside of the comics: One movie in 89, one abomination of a TV series a few decades ago, and two animated versions, one of which was changed to a monkey-jumping no shoe wearing version. Was that good just because it was something different? Just because there's a change doesn't mean the change is always good. It has to be a good change for it to be good. Would you trade your house for a different one right now just for a change if it was smaller, painted odd colors, and didn't have some necessary parts to it (ala if you're a brick aficionado and this one had aluminum siding)? So why change the Joker to a simpler version just for the hell of it when you've got a character that people have loved for decades and decades, only having the tiniest bit of change in all those years?
To have a Joker that just applies makeup and is nothing but a normal guy? With the permanent bleaching/dye and smile, that man IS the Joker for the rest of his life. With the makeup, that man IS "the normal guy", and he simply BECOMES the Joker with makeup. If you take off that makeup, he isn't the Joker just as much as Christian Bale isn't Bruce Wayne. A Joker with makeup is a criminal acting the part of "the Joker", as opposed to "The Joker being himself." That's the best way I can explain my distaste from what I've seen so far of this character. Its about as pointless of a change as how there isn't going to be a batcave or Wayne Manor in this despite how they set up at the end of BB that they were going to be remodeling and time has passed.