First of all I'd like to say: NO THERE'S NOTHING NEW HERE.
I just found that keeping up with the long sneak peak threads was quite a lot of reading due to all the (much deserved) praise, questions and other chat, and went through all the sneak peak threads and tried to unearth as much information as possible and compress it here in an all-in-one thread so everyone get's a nice overview. For more information I've provided the link to the actual thread.
Sneak Peak I: AI submarines
http://www.subsim.com/radioroom/showthread.php?t=116843
The GWX team's objective is to further counteract the lack of AI submarines in stock SH3. As we all know from GMX 1.03 there have already been released the lend lease American S-class boats used by the Royal Navy as well as an American Gato/Baleo/Teng-class sub.
In GWX 2.0 we will see further more:
(real) British S-class
British T-Class
Italian Adua Class
Russian Scuka Class
Additional Information in Sneak Peak I:
Liberator Bomber
He-111 Medium Bomber