A pensioner who pioneered a $400 million plus water park on the Sunshine Coast has won a court battle with investors after being left with nothing

The 73 year old Arthur Downing spent five years finding the site on Steve Irwin Way before agreeing to his project in exchange for $1.25 million.

But he was never paid. However, a recent appeal has ruled in favour of Mr Downing and the company is now in the final stages of negotiating the bulk of the earthworks contracts.