Johnson's retroactivity - ACCA
The Supreme Court's holding that the residual clause of ACCA was unconstitutionally vague is not, by its terms, retroactive, and AEDPA bars a second or successive Habeas writ seeking relief based on the holding.
Dissent: Retroactive, AEDPA shouldn't bar the filing of the writ, insufficiently briefed, court should certify the question to the Supreme Court (!), divergent circuit holdings on the gatekeeper question are themselves a constitutional violation.
http://media.ca11.uscourts.gov/opinions/pub/files/201515456.ord.pdf
Since 2011. An occasional commonplacing of the U.S. Circuit Courts of Appeal.
Neither an authoritative statement of the law nor legal advice. Quick work.