The firm that is picked as adviser is expected to become the main contractor.
The construction element of the work, which will take on a 17 ha site called Paradise Street, is expected to be worth about £400m. The scheme has been masterplanned by Building Design Partnership.
The scheme is presently the subject of a public inquiry, which started at the beginning of this month. The inquiry, due to finish mid-October, will hear from about 30 objectors, including local businesses.
Deputy prime minister John Prescott is due to make a decision on whether to go ahead with the project early next year.
The firm picked as adviser is expected to become the main contractor
The scheme will include 148,000 m2 of shopping, 21500 m2 of leisure space and 364 houses and flats.
It was originally due for completion in 2007.