Well.
I'm pretty sure that I'm just 10 years beyond being excited about them, but I get this nagging feeling that Blizzard's only been getting groups that just happen to live in the Anaheim area so that they're not terribly inconvenienced for having to travel to the con. Cause I'm pretty sure Blink 182 hasn't done anything major in the last five years from what I've heard (apart from Barker being in a plane crash).
For example: At 2011 Dave Grohl was mentioning that he only lived like 20 minutes away and talked about his swimming pool. :P