Just a few minutes ago, Shane tweeted a memorial message about ANZAC day.
The second part references Pirates.
'Art' - NFTs
'Treasure' - Resources
'Prize of old' could mean 'first come first serve'
'plates of gold' - Prize!!
All this could mean: 'Whoever comes first with the NFTs or Resources will claim the prize (of gold)
A second, more humorous theory could be that Shane is joining the Kraken.... something we would love to see.