Great news, and it's also interesting to see what individual chips were used for. This will help not only FPGA recreation but also MAME and any historical preservation efforts.
This project aside, I wouldn't be surprised if an FPGA Neo Geo pops up in the next 3 years. Analogue might do one since that's what they started from and Kevtris often talked about what PCB architecture would be required (memory banks etc). So, outlook good