It hasn't hit DVD yet, but one of the spoilers showed Noa as a giant to even Zero (Noa being Nexus' true form, to those who don't know) and granting him Ultimate Power in his fight with Belial.
Not sure the EXACT particulars of that, considering everything, but when you remember that Noa was mentioned way back in the original series as some Prehistoric Ultra Being, and take into account how easily he defeated Dark Zagi...