Well, if you're referring to the XI bits from the interview, I'd say Promathia is the closest analogue we have at the moment given we saw him as a giant Dark Crystal similar to Hydaelyn.
In XI, Promathia, God of Twilight is - and these are kinda big CoP spoilers, so I'm going to spoiler them, even though it's like 12 years old:
1. The father of all of the mortal races.
2. Killed/Banished/Chained before creation.
3. The counterpart to Altana, the Dawn Goddess. They seemed to be lovers, as implied by Dawn.
3.5. As with WotG, Altana did something rather foolish in a desperate bid to ensure his continued existence. She spread his essence throughout the mortals. In doing so, she destroyed the singular mothercrystal and it split up into to 5 we have in modern XI.
4. Promathia did create an Emptiness, the purpose of which was the return of all things to death in Apocalypse. He sought to reunite all of himself that Altana split, the parts of mortals, more than out of actual hate.
Here's the lore summary, right from the very last cutscene of CoP, it basically just says the above, but it's in-game:
https://www.youtube.com/watch?v=O8H_REHvISc
Despite having control of XIV's Voidspawn equivalent in XI, I'd definitely say Odin is not an analogue.
Since Yoshi's XI comment was related to it having alternate worlds and possibly being used in a XIV context similarly, Promathia's related to three of the four we know of in XI:
The lack of 3.5 from my spoilers above happening at all because 2 didn't happen, which basically didn't lead to creation. This is the last one Rocl mentioned that I forgot about - Provenance.
Us failing to defeat him and stop the spread of his Emptiness, which sent the world into a cataclysm in Abyssea when he mutated into Shinryu.
Something to do with Iroha's future world as well, since that has to do with Emptiness, but I haven't played the last Rhapsodies chapter.
This all being said, I don't think they're going to be drawing directly from XI. I think Yoshi's just saying we're going to be using similar thematic elements, such as in WotG familiar characters being antagonists in the other world due to differing circumstances, a failure of one event to occur changing everything, or something equivalent to Altana's emotional response that ended up almost destroying everything (also used in XIII, by the way), but also leading to all of creation.