We'll never know, of course, but I'd be more interested if they'll be omitting any planned mentions of Apple's/iCloud's security, since the expanding of iCloud is one of the touted features of iOS8.
Why would they. Apple is investigating the problem currently and have fixed what they believe is the security issue for now. If it has been fixed, then there is nothing left to mention.
(UNLESS this "hack" continues to grow in size and Apple is definitively proven as the negligent company / software. Then they'd have to address concerns about the potential iWallet and HealthKit.)
Anything from a Craig style joke to Tim apologising to Phil talking about security upgrades in iOS 8/Yosemite. Just a mention by any of them.
(Because we all know they're the only 3 who'll talk on stage)
The only thing they can mention is "So that's it for the new iCloud Drive. Oh, and we've added so many new security features in the past few weeks in iCloud that it's become the Eben-Emael of the clouds."
They're there show off and praise their work to up their stocks and company value. If they ever did mention anything negative it would destroy their press.
Anything from a Craig style joke to Tim apologising to Phil talking about security upgrades in iOS 8/Yosemite. Just a mention by any of them.
(Because we all know they're the only 3 who'll talk on stage)