"Stories yet to be told" is a stupid cop out by someone who shouldn't have the job they do.
For another one:
Despite what others have claimed and will no doubt come snarl about, I don't think what was done with 'The Five' will do anything but harm those characters. It may have made them 'important' in universe but mostly seems to have made them non-characters. Just plot devices that are only going to get killed off or otherwise taken off the board by some 'OMG look how evil and powerful they are!!!' big bad Hickman probably has stored up his sleeve.