ESA has released its most up-to-date list of publishers attending E3 this year and right at the top -- which doesn't mean much considering it's alphabetical -- is last year's noticeable no-show, Activision-Blizzard. This doesn't mean that Blizzavision is back with the ESA after it left the organization last year, but it seems the two parties have reconciled enough that Actilizzard isn't going it alone this year.
One of the few noticeable names not attending the reinvigorated trade show is NCsoft, who we've contacted for a statement.
Although E3 is still not open to the public, eligibility to attend is more lax than the last two years. If you're curious about going, it'll take two pieces of "industry identification," such as a "company credit card, paycheck stub or W-2 form." Best of luck to all the GameStop associates wanting to attend.
Update: Word from NCsoft: "While NCsoft has been a member of the ESA in the past, we are not currently an ESA member and do not expect to attend E3 this year. We will continue to evaluate how E3 fits into NCsoft's plans each year." As to "why?" The company didn't answer that.