In the link below, check out this mock OIA-ILH football alignment suggested in a Star-Bulletin commentary in 2003, calling for three divisions, including one super (Diamond) conference.
It’s interesting to note the powers du jour were quite a bit different 13 years ago. Aiea and Pearl City have dropped off a bit since then and Waianae and Campbell have improved.
At the time, a Waianae fan contacted the Star-Bulletin, incredulous that the Seariders would ever think about dropping down from the top division.
There have been other stories by other writers over the years suggesting much the same thing, including articles by the Honolulu Star-Advertiser columnist Dave Reardon and reporter Paul Honda.
Here is the 2003 story: http://archives.starbulletin.com/2003/11/26/sports/index7.html