I think it's cool. As long as we don't get Batman's origin. Seriously, skip Crime Alley. WE KNOW!
Also, Batman never struck me as the kind of guy who calls someone whenever things get too tough. In fact, if he did so, it would kind of remove a bit of power from Batman, wouldn't you think? "Oh, a hostage situation! This looks like a job for Superman! (pulls out phone, dials)"
An added bonus to going that way...you have automatic mystique of Batman, the viewer will see Batman much like the citizens of Gotham would see him.
Who is he? Is he good/bad? Does he have rules?
In the films/comics, the viewer always knows Batman and how far he'll go and what's motivating him, but having him more mysterious, we'll get a different view of him.
The more I think about it, the more excited about this I get.