There's no box sets right now.
But, there's two in the pipeline for later this year.
A 2-Mech Beginners Box (around $20 USD) and a 8-Mech box called The Game of Armored Combat (around $60 USD). Each box comes with new sculpt minis, new maps, new cardboard punch-out Mechs, and new fiction.
Oh BTW, a number of those minis have new visual designs of the Unseen/Reseen defined as
Classics. You can start
here on Shimmering Sword's DA account. There are 15 so far.
Oh, and welcome back to the
madhouse... er... Forums!