With that out of the way, I'd choose MK. Antarctica will be swamped the whole day, plus how often can you see a sunrise over the castle?
Which doesn't mean that I might not try the May 24th at DLR...
This whole promotion date makes me MORE interested in going to Antarctica. Is Disney that worried about SeaWorld taking away a significant amount of business? I doubt it; however if they are willing to pull promotion like this then they must think that SeaWorld has created something special with Antarctica, and I can't wait to see it!
To borrow (and then alter) Mr. Niles' words "if that May 24 date sounds familiar and significant, it's because that's also" the Friday before Memorial Day weekend.
By scheduling the rare, 24 hour event on the Friday, visitors who planned to hit WDW over the long weekend will start arriving the Thursday night before -- increasing resort rooms booked and money spent during those typical "night-before-the-parks-Downtown Disney forays."
Brilliant move by the folks at Disney.
I will be out of town that day, but if I was here in Orlando I probably would visit both SeaWorld and MK.
Those that are planning on going to Disneyland resort, please note that last time, they hit capacity around 9pm once everyone was off from their day jobs. So whatever park you are in at around 8pm, that's where you'll be staying all night.
I have a feeling more people are going to flock to CA Adventure this time around.
Universal has construction crews on-site almost 24/7. What would normally take 3 years can be done in just 1. Potter 2.0 is moving at incredible speed compared to the first land at IOA.
I do see Disney beginning to somewhat compete with the other parks. Disney usually sets the standards, if it continues to try and beat competitors, it's just a slippery slope. I pray that they see this before it's too late.