While it would be *really* hard for me to pass up trying something new, I suspect/think that if you want to do the event for riding with no wait you might be better off with the last DAH. On the other hand, if you're willing to take the chance it might not be as good from that POV, trying the new one could be cool and if it turns out amazing you can say you were at the first one. But it very well might be the last regular DAH, and if the villains continue you can do it on another trip. Or possibly the villains won't continue, and DAH will be back for your future trips and you will have missed the short run of the villains. As you can see, I keep thinking of reasons to do one, and then think of a counter reason to do the other

.
I do think, while there are some interesting aspects of doing the first night with all of the bloggers, I suspect overall it might annoy me unless it really isn't noticeable.
Having written that, I have no idea which I would do. My head would say the last DAH since we did one and LOVED the no line aspect, but like I said it would be so hard for me to pass on a new event. I guess I'm glad I'm going when there is no choice (It's moved to the Villains DAH when we go), because I have no idea how I would pick!
Have you considered doing both? if you can swing the money and your schedule isn't too messed up by 2 late night events, I would at least entertain the idea of both!
Sorry I was no help, I should have just gone to bed like I need to instead of posting