Originally posted by Starscream MHours, perhaps. I reckon less than a day. Hard to say, given how the story was told. I suppose one could ask: How long would Superman have to sundip to reach pre-crisis levels, and use that as some kind of reference.
Superman would be insane if he dips for a weekin OWAW...how long did he dip before he became a demigod?
Unfortunately, I don't know how powerful Wally is. I would think he better be herald-level at least to defeat a week-dipped Superman.