It's not implied - what
is implied is that they'd use the life seeded by Zodiark, which given what we now know of how creation magicks functioned and the apparent emergence of life on the star (i.e. that the ancients were responsible for at the least a good chunk of it), is very likely to be further creations. When you say "new races", there are none. The sundered are sundered ancients who evolved in specific ways in response to their new circumstances according to the Q&A. All this leaves is animals, plant life and arcane entities/familiars (of which the WoL is
not considered to be a characteristic example, as per the sidequests... even Meteion, an unapproved familiar which nonetheless is herself in some facets robotic, is exceptional.) So effectively, arcane AIs in the last category.