It wouldn't actually be unethical of SG not to confirm or even deny anything of what we've learned today before it's confirmed or denied at the Fest. As I've said before, SG shares what Marcy is told by her official sources or what she comes across on her own or through the SG subscribers. If no one shares confirmed information about developments with the Depp/DS film with her, she's not being unethical if she's not reporting anything. And any official sources aren't being unethical if they choose to keep to themselves any confirmations or denials until the Fest because they have every right to choose to disseminate their info whenever/however they choose to - not simply because some of it may have been leaked, perhaps even inadvertently, on the Internet. And if they choose to stick to what was probably the original plan of waiting to make the official announcements at the Fest, that's their prerogative. It's not like TPTB would be hiding matters of national security that the public have a right to know. It's simply news about a movie.
Sure, some of us might like to know sooner rather than later, but chances are most of us are still going to be just as excited and interested to learn the confirmed details seven weeks from now as we are today. It's really no biggie if we might have to wait that long.