The -d32/-d64 flags were introduced to switch data model specifically for Solaris, to support overlay images. Solaris no longer supports 32-bit image as of JDK8, see JDK-8024033.

Though it would be ideal to remove these launcher options in jdk9, the normal agreement is to allow deprecation and notification for 1 release,
and there have been concerns to making the options emit messages.

After considering these items and discussions with the concerned parties, the deprecation language will be put into appropriate man pages and release documentation.