I had made these Acacius sketches because I got a request for it. Acacius had been discussed on the KC forums and the consensus was "not as memorable/interesting as Red or Solomon" and that 2 NGC representatives was enough. Though I like Acacius' design, I agree with both points.
And Solomon and Red aren't exactly "in" yet, we'll have to see how the roster vote that includes them goes. At the earliest they might show up in Kaiju Combat 2nd release.