There are many possibilities with a game based in the Pacific:
Jungle battles
Beach landings
Town battles
City battles
Mountain(ous) battles
Naval artillery
American/Japanese/British/Australian/India-Gurka/Dutch (DRECKS where are you!!!
) among others
Naval air strikes
Armor
Flamethrowers
Banzai charges
and probably a few more things that are 'available'
Honestly, they could really have a hit with something that was done RIGHT (not like MOH Pacific Assault). Of course, they could really blow it too.
My prediction: In the end, it will look really good and there will be a few novelties that are really neat. But ultimately by my standards (RO standards) it will fall short. IW will still be hitting the 'teenage console crowd' market for maximum sales. However, if they decided to do something gameplay-wise between COD and RO, I think they could win big in my eyes.
Just my opinion.....