User blog comment:Thailog/Ep. 207 "Depths" discussion/@comment-4026406-20120628025526/@comment-3094698-20120705190422

it most likely wont be a character that has anything to do with the green lantern mythology because of the green lantern animated series airing at the sametime. dc has a history of blocking certain characters from one show when they could appear in more than one which is airing at the sametime.

take justice league/the batman/ teen titans for example; no batman characters other than batman were allowed to be used in justice league because the other 2 were airing at the sametime, also robin wasnt allowed to be used in the batman until teen titans ended, thats why batgirl appears first in that show