I was hoping they would just let Martin Stein enjoy being a grandfather to his time aberration grandson. Although I guess I liked the bits about Martin loving Jefferson like his own son. Nice to know they really did care about each other.
I'm calling it now...baby Ronnie will return as a villain one day!
Reverend Meteor (and who is that kid's father?)
Good question, who is the father of that kid?
Also despite what happened, Stein can return as an alternate Earth doppelganger or time aberration.
But as I recall that serum was designed to sever their link, but also to allow Jax to still be Firestorm, or has that gone out the window?