Unless somebody goes on the record with this, it is just another such rumour.
I am quite certain that some people spread them deliberately, either out of a feeling of personal importance, or because they work for the CAA and they don't like the fact that the CAA isn't getting the CofA and license fees.
Which isn't to say that something isn't in the pipeline. Forcing N-reg to do their annuals in the mainland USA would be a particularly vindictive way to go about forcing GA to G-reg, while not affecting large cargo operations.