(just my own personnal thoughts, not necessarily Sun’s point of view).
Just read this post titled “SCA & SDO, the next Corba?”. When SCA came out, one of the oustanding question was to what standards body it would be submitted. OASIS, W3C, JCP? Well, OMG it will be. I’m glad we have UML and even CORBA (IIOP, OTS, etc…), but it really seems like OMG has moved on to MDA and vertical markets. I’m not too concerned by SCA as a technology, as it has little overlap with Java EE 5 and JBI. See Ron’s series of posts:  &  on that subject.
To the question “Will they just accept SCA & SDO specifications as is?”, the answer’s “no” if the process is truly open. That’s the difference between a specification and an open standard. To the timing question, I just hope it’ll be faster than for the CCM.
Oh and Sun joined OSOA a few days ago. Probably a good thing.