However, the future of the architect's role in the project may be in doubt after it emerged Manchester City Council will have to re-open the competition for the plot in regeneration zone New East Manchester.
But unfortunately for the practice, the authority will now have to undertake a full competitive tender process to comply with the Gambling Act.
A spokesman for the developer said: 'Whether ASK and Simpson will be the team behind it remains to be seen.
'This is the go-ahead for the site rather than the scheme as first planned.'
The decision, which has to be rubber-stamped by parliament, also means hot favourites Blackpool and the Millennium Dome will both miss out.
This will be a bitter blow for Blackpool's regeneration plans and could spell the end for Gensler's massive seafront leisure complex.
Doug Garrett, chief executive of regeneration company ReBlackpool, said: 'I'm very disappointed indeed at the outcome, Blackpool's future was something built around our plan.'