So, I did a little more digging around the websites. Apart from the many spelling and grammatical errors - including in the company name, I've noticed the following:
The business website - https://rhccity.com.au/
The 'Leadership and Management' section only has one name - Ramin Ahmadi. Here is his LinkedIn page:https://www.linkedin.com/in/ramin-ahmadi-29a85215b/?originalSubdomain=au
He has 50 connections on LinkedIn.
His current business Neguin Pty Ltd. has only 3 people associated with it on LinkedIn (including himself) - one is a retired marketing executive Vernon Tang who left the business in 2008. The other is an Auckland based writer/architect Noushin Ahmadi - possibly a daughter or other relative who left the business in 2016. The business seems to spruik residential apartment buildings as it's most successful and most recent accomplishments.
The listed address: Level 38- 71 Eagle St. Brisbane, Qld 4000, seems to be a co-working space that offers 'virtual offices'. https://www.myspacesworks.com/centre/5486/details
There is no contact information other than an email address on either the infinity planet or RHC websites.
The theme park isn't actually listed on the 'Sections' page of the infinity planet site when you click through to it.
There is no way this concept - with its complete lack of detail on any attraction - including for the business/tech park, lack of any leadership team, board of directors, anchor tenants, publicly named investors (including private equity), or established intellectual property licensing, has attracted $2.6Bn of investment.
I get that big ideas can come from ordinary people. Everyone starts somewhere and I don't want to crap on anyone for trying to punch above their weight. But this isn't a big idea, this is no idea. There's no substance to this.
Maybe he should put a little more effort into the actual attractions, theming, and functions of the spaces before launching this thought-bubble to attract investors.