The 55 ha park is proposed by Bristol Zoo Gardens for land near junction 17 of the M5 motorway in South Gloucestershire.
Unveiling the designs, Bristol Zoo Gardens said it is now set to submit proposals to South Gloucestershire Council - although planning permission has been in place for the park since 1967.
Bristol Zoo Gardens is preparing to submit the proposal to local council and said it wants to have to park built by 2012.
While no further grant of planning permission is required to use the land as zoological gardens, discharge of conditions is still required to erect buildings and for other detailed works.
The land known locally as the Hollywood Tower Estate has been owned by Bristol Zoo Gardens since 1965.