Looks badass as hell! Buuuuut...It doesn't look really Cybran. Mainly because most of their stuff heavily favors large, hard, sharp angles. I speak of the ACU and the dragons mostly. Plus the guns on the large spider bots look a bit small for ANY thing that came from Supreme Commander.
After Supreme Commander: Forged Alliance, Dr. Gustaf Brackman managed to harness captured Seraphim technology. It would not be surprising for Brackman to put the technology to full use. (This is just a hypothetical explanation)