You can waive remand. That's Lexecon, Inc. v. Milberg
Weiss Bershad Hynes & Lerach, 523 U.S. 26 (1998). But, if
you agree to remand, you're going back whence you came. So said
the Judicial Panel on Multidistrict Litigation earlier this month
in In re: Biomet M2A Magnum Hip Implant Products Liability
Litigation, 2018 WL 6426830 (JPML Dec. 6, 2018).
That's pretty much all the 4-paragraph opinion says on this
issue of first impression. The JPML cannot "redirect the
remand" to a non-originating court. What the opinion
doesn't tell is why the request was being made in the first
place. So, we did a little digging. At issue were three cases
selected for remand from this MDL. The Chadwick case had
been originally filed in state court in New Jersey and subsequently
removed to federal court. Plaintiffs included as a defendant a
company whose sole role in relation to the device at issue was to
supply raw materials. That company, a New Jersey company, was the
only thing