The Tolkien Library describes...
'In a world rights deal, the Tolkien Estate has signed with HarperCollins to publish for the first time Beowulf: A Translation and Commentary by J.R.R. Tolkien. This is truly exciting news! Not only do we get Tolkien's translation of Beowulf and commentary by J.R.R. Tolkien but it will also include "Sellic Spell", an unpublished short story by J.R.R. Tolkien, re-creating the (lost) folk-tale underlying the Norse Hrólfs saga kraka and Tolkien's prose work that was to serve as the background for Beowulf. The original manuscript is held by the Bodleian Library and will now be published for the very first time.'
For a little more info.
I'm sure this will come as close as possible to the perfect Modern English translation.
Looking forward to it.
I didn't know about "Sellic Spell". Looking forward to the Beowulf translation even more now.