What, 4 UTMs isn't enough?
I don't really think so, the UTM is meant to be a beginners
terrainer map anyway, and believe me when I tell you it's a
total bitch to make it bigger, on top of the fact that the
bigger you make it, the more buggy it gets. So, yeah, unless
someone decided to make a new one, there likely won't come
a new one. If anything, I think there'll be derivations of it,
like Talavaj's Stone and Sword Modular packs.