Having recently returned from the annual SBL conference, I came across a few new resources on Hebrews.
Hebrews by John Kleinig:
"This commentary is built on the common agreement that this book is a
written sermon by an unknown speaker. John Kleinig, the author of this
Concordia Commentary, proposes an interpretation of the text that uses a
new kind of liturgical rhetoric, a new method of discourse analysis,
and a new consideration of the context and purpose of the homily."
Hebrews-James by Ronald Rittgers:
"In this volume of the Reformation Commentary on Scripture, church
historian and theologian Ronald K. Rittgers guides readers through a
diversity of early modern commentary on both Hebrews and James. Readers
will hear from familiar voices as well as lesser-known figures from a
variety of theological traditions, including Lutherans, Reformed,
Radicals, Anglicans, and Roman Catholics.
Drawing on a variety of resources—including commentaries, sermons,
treatises, and confessions—much of which appears here for the first time
in English, this volume provides resources for contemporary preachers,
enables scholars to better understand the depth and breadth of
Reformation commentary, and helps all who seek the assurance and
conviction that is found in Christ alone."
Third, GlossaHouse has produced a festschrift for Donald Hagner, entitled Treasures New & Old. It contains a couple of essays on Hebrews:
Schreiner, Thomas R. "Another Look at the Warnings in Hebrews: A Response to Critics." Pages 231–48.
Mackie, Scott D. "Experiential Cultic Soteriology and the Origins of Hebrews' High Priest Christology." Pages 249–67.