How about some examples?
There were other cases cases working their way up to the Court.
Is there any reason to believe their fate at the hands of the Taney court would have been any different?
Of particular note was Lemmon v. The People. The New York Court of Appeals held that all slaves -except fugitives- became free the moment they stepped into the state. In dissent it was noted the act would be a valid cause for war. Lemmon was noted as one South Carolinas reasons for secession.
Where was it noted?
Lemmon to start with. But there's more in SC's declaration of secession.
"Is there any reason to believe their fate at the hands of the Taney court would have been any different?"
An excellent point. There was absolutely none.
"Where was it noted?
American Legal History Cases and Materials 2nd ed. - (Judge Thomas W) Clerke believed that the decision was "wanton aggression" for "mere propagandanism" Clerke warned that under international law the act of New York "would be a valid cause" for war.