Fivepoint spinned off from Lennar early this year. It is the biggest landlord in Great Park and might be second to Irvine Co in Orange County.
Below is the link to the Fivepoint Initial Public offer documents.
On Page 111 of the PDF or Page 105 of the IPO doc, it tells details about their Irvine development.
P.112 (PDF) itemized number of residential units built and to be built in each development area.
If you search Great Park in that 1342 pages IPO document, you might find more info you might interested.