^ I'd guess he's referring to Mandrakk I (ie. Dax Novu.)
Anywho, all we know about the First Firmament so far is...
*He predates the whole of Marvel creation, and fashioned the first Celestial race.
*A war between two factions of Celestials shattered the FF's totality into hundreds of pieces, thereby creating the first multiverse(and every iteration of it since.)
*The FF chained Eternity -- though it was specifically stated that he waited until Eternity was weakened(by the events of Secret Wars) to do so.
I'll give him a few more issues before I say anything definitive regarding the outcome here. WAY too early to call it. 🙂