C1283 Sinestro's Advice!
Generally speaking, to expose a ‘spy’, it was either because they had no other choice but to start a war, or they were well-prepared to start a war.
" Lex Luthor secretly contacted the Batman." This was a top secret. At first, Qi Ann did not know about it, but when she found out about this secret, she knew that the Batman had most likely already scheduled the final battle
