The two buildings are planned to rise 50 and 55 stories. They would include hotel, office and residential, with retail at the base.
Construction is hoped to begin within three years.
David Braka, vice president of property owner Aetna Realty, said that while there are plans to keep and renovate the original building, most architects and engineers are pushing for it to be replaced. Demolishing and replacing would allow the new building to be customized to tenants, although there aren’t any problems with the old building.
Aetna has already been contacted by several retail companies, he said.