So I emailed Rob MacGregor yesterday, asking him about his upcoming Indiana Jones novel, and got a quick and informative response:
He also mentioned this, in case anyone is interested (I know I am):
Very nice guy, all around (and great writer all around as well).
I find it interesting that he mentions the game and novel have "somewhat similar storylines". I suppose thats no big surprise, as some condensing, added characterization, or even ommission, addition, or re-ordering of events between the game and novel is probably to be expected. But at least now we know for sure that his new Indy novel will adapt the upcoming game.
Also interesting that its delayed until Fall of 2009, which I assume means thats when we can expect the game (I think its safe to assume they'll release the game and novel around the same time). This supports the theory I had that the Indy game won't be out until Fall of '09.