Greetings and while we're waiting for more news on The Harbinger, I have had a thought:
Since the main problem most of us 'might' have with an Ocean expansion is, where do you put it with the whole table(s) being used up for the other expansions an main board?
Well, perhaps Talisman ~ The Ocean Adventure should be it's own game. A game that is totally tied into the main, land based boards, but represents an ocean (with Islands or what ever) that is separate from the main board. You could have the tie in being you must go to the City, or the City Expansion's wharf, to charter your ship out.
There would be "no turning back", if you venture to the sea, you have removed yourself from the land/board's actions.
So, the game starts with the players/characters setting sail, pretty much and goes from there. If you have enough players, perhaps you can host both boards (I'm thinking a Ping-Pong table might work?) and go at it, but basically
The Ocean is a separate game that exists in the Talisman Realm or "World".
(I based this idea after thinking how easy it would be to create the ocean for a digital environment, as you're not limited to actual table-space)