We reported on what this means for Man of Steel earlier.
Batman On Film, who have a pretty solid track record with their Warner Bros. sources, reported last night that if the Man of Steel is a success, but there's no Justice League franchise demanding Batman's immediate attention, it's possible that Warners might opt to let Batman hang up the cape for a few years.
“Don’t worry about the Batman [film] franchise,” the site's source told them. “It’s [Warner Bros.’] most valuable [DC Comics-based] asset," the source added. “I believe that they are now looking at introducing [the rebooted] Batman in a solo film, though that will likely take place later than they initially planned. They are extremely worried how [the Batman film franchise] would be affected if Justice League bombs...and rightfully so....The fact that what should be the core fanbase of a Justice League film isn't on board is making them sweat as well."
“If Superman [this Summer’s Man of Steel] is huge, then they’ve bought themselves some time and will have a franchise to hang their hat on for seven, eight years. The need for Batman won’t be as great, and [the reboot] of that franchise can wait until the Superman trilogy is done.”
That could push a Batman film back to 2019, two years later than the same site reported it would likely happen if Justice League were to hit theaters in 2015.