Both Norman Foster and Richard Rogers are to reveal proposed skyscrapers for the Ground Zero site.
The pair both have plots on what is left of Daniel Libeskind's competition-winning masterplan for the site of the terrorist atrocity.
These will be two of the first four towers built on the hugely contentious site, alongside Freedom Tower, by SOM's David Childs, and a smaller one, by Fumihiko Maki.
The Foster, Rogers and Maki towers - which were commissioned by lease-owner Larry Silverstein - will contain a total of 620,000m 2of office space and will share a common podium and ground engineering.
Silverstein had previously commented of the trio of appointments that it was challenging to work with 'three major egos'.