From a well-placed source, responding to my earlier speculation:

not in a million years.
after a quarter century in public service, Owens has made numerous financial sacrifices, so more public service would have to be exactly the right role on issues that he’s passionate about.
he told the staff yesterday that he ain’t going, and I talked to the press sec yesterday after I got calls and he and I are instructed to pour cold water, by the bucketful.
and, having said all that, knowing Owens, nothing would ever surprise me. but I think this is pretty remote.