Board Thread:General Discussion/@comment-31524712-20181013103752/@comment-24740411-20181114185838

http://tsdr.uspto.gov/documentviewer?caseId=sn87366814&docId=NOA20181114084416#docIndex=0&page=1

It also says Toei is(was until abandoned?) the owner. And it was known for a while they took the copyright from Saban. So perhaps for this reason, Hasbro never had it to begin with? If Saban didn't have it when Hasbro took all their copyrights.