No formal announcements. Which is what you might expect from the Sullivan brothers, who ran the 400 Bar on the West Bank in its indie-rock heyday.

Their new 400 endeavor at Mall of America – part of the entertainment complex that includes the just-opened Midwest Music Museum – has several bookings, Bill Sullivan told me at a preview party for the exhibit "Ladies and Gentlemen, the Beatles" at the museum.

He said the first shows will probably be after July 4.

But they haven't posted anything on their website yet – except to follow them on Twitter @400Bar.

And he said the new space is still under construction at 400 East Broadway at the Mall of America. A "400 Bar" sign -- which looks just like the one at 400 Cedar Av. S. -- has been painted on the outside of the new club.

Meanwhile, the only announced show is Aug. 1 with Denny Laine, former member of the Moody Blues (remember "Go Now" from his era) and Wings (Paul McCartney's post-Beatles band). However, tickets haven't gone on sale yet.

The old 400 Bar, which closed in late 2012, on the West Bank. Star Tribune photo by Bruce Bisping

Tom Sullivan said it has been a "condensed" learning process with this new endeavor, which will also include a restaurant.

He promises that the new 400 won't be dependent on a group of hard-core fans (like the old corner bar was) but rather draw from the entire Twin Cities as well as the millions of tourists who come to Mall of America each year.

Mason Jennings, a regular performer at the old 400 Bar, was at the preview as were Lori Barbero of Babes in Toyland and other members of the Minnesota music community.