Waller
In the Batcave, Bruce was getting worried. Waller had revealed to the League that she knew that her weapon was among them. Bruce knew that Waller wanted the League to turn against Isabel and betray her to her. There was turmoil in the League; everyone was wondering who the 'weapon' was. Superman had returned to the HQ, calming the members. They both decided that Isabel was to stay at the Mansion.
Undoubtedly, Isabel wasn't happy to hear the news. She loved hanging out with Flash, Wonder Woman, Hawkgirl, Green Lantern, Green Arrow, J'ohn and sometimes even Question. Batman caught her sneaking up to the teleporter and made her sit next to him at the Batcave. Isabel frowned at Bruce, angry at him for not letting her fight with Waller.
Bruce caught Isabel glaring at her again and sighed. "Waller knows that you are in the League. You are safe here."
Isabel retorted, fuming, "I joined the League to fight against villains, not to hide from them!"
Bruce gave her a cold stare. "Do you really think you can fight against Waller? If you lose, you will be locked away by her just like Luthor did for 6 years." Bruce knew that using her terrifying experience with Luthor to restrain her was a low blow but he had to make her understand that this wasn't her fight.
Bruce had succeeded in quieting Isabel. "I believe that there is at least one spy working for Waller in the League. It is too risky for you to return to the HQ."
Isabel gazed intently into Bruce's eyes. "You're not telling me everything." Bruce thought sadly, "This girl is too smart for her own good."
"Waller announced her attack of Justice League tomorrow if we fail to cooperate."