(August 29, 2023, 10:21 AM EDT) -- DETROIT — A Michigan appellate court affirmed a lower court’s orders consolidated on appeal that denied a successor trustee’s petition to register a trust and granted the petition of the octogenarian trustee to revise his estate plan and disinherit his nieces and nephews, finding, in part, that the nieces and nephews failed to show that there were disputed facts regarding the trustee’s testamentary capacity and that their arguments about undue influence are waived because they failed to raise that issue at trial....