My wish for a Soft-Reboot
Actually I am hoping that we get a kind of Soft-Reboot (Doomsday Clock,Superman Reborn) which brings the Pre-Flashpoint Timeline back along with keeping NEW52 and Rebirth Characters.
So it would be nice if Conner shows up in Reign of Supermen and Jon gets born 1 year after or so.
Pre-Flashpoint Stories then take place, with Jon being there as a kid, then after Conners Return, Conner leaves Smallville and marries Cassie and lives in Hawaii again, while Jon lives in Smallville with his grandparents.
Conner needs to make this Nightwing Step and get a fresh place where he can develop as Superhero (like Nightwing in Blüdhaven)
Jonathan showed that he prefers to live in a small town on a farm and can develop his powers there and many people prefer him as 10 year old guy.
So Clark being around 35 years old, Conner being around 20 years old and Jon being around 10 years old..