According to the Chicago Tribune , the Chicago Cubs have filed paperwork with the City of Chicago in an effort to erect a huge, "lighted billboard" in left centerfield before Opening Day.
Sources tell the Tribune that the Cubs have asked for permission to build a 360 square foot sign that would rest 72 feet off the ground, likely blocking what has historically been the "Budweiser" roof across the street from the stadium.
In the last couple years, however, that red roof has been leased to other businesses, including the Horseshoe Casino. The Ricketts Family, now owners of the Cubs, have been clear since taking over the organization they want to expand the potential revenue sources for the team.
One major hurdle for this proposition is that, according to the reports, the new signage would change the "look" of Wrigley Field. Wrigley has historic landmark status with the City of Chicago, which handcuffs any significant changes that could/would be made to the structure of the stadium.