Very quick entry, as we are lacking details at present.
A Bruce Lee game was mentioned in a PC Show 1988 article in Commodore User magazine to be developed by Grandslam.
Nothing more was heard, though we are sure a few more news items surfaced at somepoint with a bit more detail. We can only guess that Grandslam couldn’t afford the licence in the end and never secured it, so this could well be vapourware.
Do you know more?