Superman overhears the conversation among the old JLAers. He looks stern and murderous. He's gonna crush Green Arrow's head like a melon before his narration can notice.
He moves at super-speed, so sensors would not notice him enter the Dibny household.
Superman has heat vision. He started the fire. I know, you're thinking "but they were flames, not heat vision. He could as easily sprayed some gasoline and heat visioned it to create a fire to cover his tracks. This is a man that has more time to think than Batman, as he is superfast.
Also, Superman is the only guy with a tear coming from his eyes on the cover of Identity Crisis issue #1. Isn't that odd to anyone? He's putting up an act, and overdoing it a bit.
Right. Superman is the culprit...PLEASE DISCO STEVE! Superman? Nah...
