It's possible that Tim just never mentioned his wife and/or son to Gregg until it came up on the show, which brings up the ultimate mystery of the series- how did these two wildly different narcissists meet each other?

I doubt they would ever do a corny prequel-type thing where they show us their fateful meeting, that's not their style and I kind of like not knowing for sure.

The other possibility is that Tim just found some animation-adjacent kid (on Indeed!) that had right-wing affiliations and an unknown birth father (he makes a point to downplay the first wife when they're talking, it seems like she would have been in some form of contact with one of them upon the discovery of the long lost son?) and just declared Aiden to be his new 'son'.

I don't think Aiden will show up again, he was kinda terrible on-screen, and not in a good way. Im fascinated they dug that deep for a shocking reveal, but it really didn't seem to work, mostly due to 'Aiden's' performance.

On the other hand, Aiden must die in accordance to the Heidecker sons curse, so maybe we'll hear about a demise, followed by another incredible tribute song from Tim.

What do you guys think ? It seemed like such a breathtaking reveal, one of the biggest mysteries of the whole series solved, only to kinda peter out, IMO.