Very hard to give a clear cut answer to that.
Obviously interest in something like this is going to be pretty limited because of the era chosen and a somewhat "old hat" game engine. Currently I've a fairly laid back approach to the whole thing, which includes avoiding a situation where I make myself a hostage to a timetable.
Having said all that the "plan" is to release bundles of assets in stages, so the gaming environment is functional, but develops and expands with each release. The bundles will use placeholders a lot.
The "Raiders of the Deep" approach is perhaps the closest to this that I can think of. There are differences of course. RaidersDeeep has its own game engine and is also more innovative.
I'm under no delusions about this being any sort of cutting edge supermod that's going to set the world alight. Its an indulgence on my part to satisfy an old need to create a WW1 naval environment. DC/SH2 has a lot of scope for enhancement and despite its age and limitations can produce a more than acceptable gaming experience.
For general information :-
Its part of a project called Iron Seas which has its own forum here
http://www.subsim.com/radioroom/forumdisplay.php?f=226
Website :
http://www.ironseas.co.uk/index.html