When Xenagos ascended from being a planeswalker to a god, whose position did he usurp? Or was the G/R seat in the pantheon just always open? It seems like a continuity error for a plane with such strong and prominent g/r creatures, such as satyrs, minotaurs, centaurs and chimeras, to not have a minor god already in power.
Q: Was there a RG God before Xenagos' ascension? If so, who is it and what happened to them?
A: No red-green god recently existed in the pantheon; at the time of the Theros set, Theros had fourteen gods. If there had ever been a RG god before Xenagos, it was long ago.
(In reference to this, the Temple of Abandon was barely a temple at all, little more than a gathering place and an empty wooden throne. Its name implied that if such a god was ever to exist, its domain would be recklessness and immoderation — but it also hinted that the position was currently abandoned.)
@_kaburi_ on Twitter
Special thanks to Serrot_29 for Catbug'mrakul!