Raven employees have stated that they will use the same sort of SDK releases as JK2.
Anyway, I call into question the "new SP and MP modding capabilities". I know there are some code tweaks in the works but I've never heard of anything specific in regards to new modding features. Sure there will be new game features to play with but behound that we simple don't know.
Also, with the number of changes being made, I doubt that mod conversions from JK2 to JKA will be easy. Sure, if you had the skills to mod JK2 you should be about to move stuff into JKA, but it sounds like enough has changed that it will be much more than a simple cut/paste job.
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