Its beginning to look a lot like Christmas.. 
I just checked the date again to make sure this was a new announcement.
In reality, I would be more than happy with a "DW2" that featured an updated (16 X 9) graphics engine and world map while not forgetting what the mod community has done over the years (keep it accessible).
Maybe an option for dynamic or even real weather/sea state for MP sessions?
Please have a buying option that doesn't include Steam (if possible).
I'm not sure how much we need advanced animations at stations, this would be a good "all hands" discussion so I'm open to other opinions.
"Gilding the lilly" is fun to talk about but bear in mind how it can effect game play. How many cores/threads will we need? How much blood will we need to sell for a new GPU? What kind of OS can be used?
Some type of "re-supply" option in campaigns. This could be dynamic based on how a campaign is going.
For example, if the "red team" has targeted the "blue team's" supply chain, supplies (reloads) become harder to obtain. In practical terms, you want to reload 6 torps but only three are available at this stage of the campaign.