2NE1 is doing anything as a whole group but a comeback

they're releasing a documentary maybe

Too be honest, I don't really have the feeling they are "close to each other". Get the feeling is more like old school reunions, maybe fun to meet each other again, not much more. But sure getting older and some distance in time from their active days maybe have made them miss the old days together a bit more.

It would be good if they atleast drop an anniversary song like gift for fans

Quote from icyruios

More active than some groups who haven't "disband"

*cough BP cough* lol

but getting back to the topic - maybe they don't want to...there's always the possibility that 2ne1 just don't want to cb

They seem really really close.