So you're suggesting that if you reasonably relied on representations made by WotC about their release dates, and they bungled it up, costing you money and leaving you with product you couldn't release, you wouldn't have a cause of action? Because to me that sounds like you might have a promissory estoppel claim.
Now, I don't know what the format of their new license is, but don't you think that it might be a bad idea for them to put themselves in a position where there could be liability for consequential damages? Now the extent of those consequentials might not be as extensive as I hypothesized, but it sure looks to me like there could be some exposure.
Even if the publisher didn't have a solid claim, isn't there also the possibility that it might sue out of frustration (or anger)? And wouldn't that cost WotC a substantial amount of time and money?
This is all pure hypothetical, but I could see a company being a little cautious about announcing dates and providing others with the opportunity to incur expenses in reliance on those dates until they were certain they'd be meeting the dates.
--G