Mistress Gambino
Yeah, I'm pretty sure it's been stated many times that any user-inclusive event like the Zurg wouldn't be happening again just because of the mess and the butthurt and again the mess. Things got really out of control really fast and, fun as it was, it is actually really difficult to explain to those who weren't there and doesn't fit with the rest of the plot at all (not that it's been coherent otherwise, but... well you know). Bummer, but yeah. :c
H2k10 was inclusive, though one could argue it isn't the same thing. I don't really know much about H2k6, but I do know it was the only time specific users were made canon. I have the feeling there were other major differences though, else they wouldn't have tried again, right? If anything, H2k10 was more like H2k4 and X2k5. Although I don't know much about X2k5 either. And dear god all these numbers and letters.
...I like inclusive events. Getting to take part in one helped me to finally realize
why I love acting: the feeling that I'm part of a story, that I have a role (no matter how negligible) in a world of fiction, is one of the best feelings I've ever encountered. I've always loved that feeling, but never managed to put my finger on it. [/tangent]