Greenlantern_boffo Ever since Warner Bros. first announced its “Green Lantern” adaptation, the high-profile DC Comics property has been on nearly every fanboy’s To-Do list. But this past November, when a somewhat lackluster trailer for the Ryan Reynolds-starrer hit the Web, the buzz quickly turned to murmurs.

“The big-scale sequences weren’t ready to show, and we suffered for it,” says WB’s head of worldwide marketing Sue Kroll.

In a recent interview with the LA Times, Kroll admitted the initial promotion for the $200 million tentpole was uninspired. “We can’t afford to do it again,” she says.

Additionally, Warner Bros. is currently behind in its formal marketing campaign for “Lantern,” with studio topper Jeff Robinov noting “We are on a learning curve in getting 3-D materials and marketing materials on the same schedule.”

Dccomicslogpo_boffo No word yet on when the second “Green Lantern” trailer will bow, but all signs point to WonderCon early next month in San Francisco, where Warners will be taking the cast to promote the pic. (“Green Lantern” is also being trumpeted to exhibs this week at CinemaCon)

And while “Lantern” remains one of the summer’s most-anticipated releases, WB should only hope to spark fanboys’ interest over the next month or so. The studio has already set forth plans to make a sequel, tapping Michael Goldberg to pen the script.

“We won’t be in this position again,” Robinov assures the Times.

“The Green Lantern” opens nationwide June 17.

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