At least a few writers (Nan's Home series comes to mind) have Clark as 'immortal' and finding (and falling in love with) Lois's current incarnation.

In the Time series, Lois and Clark had been reborn as New Kryptonians sent to Earth as infants.

Big Apricot Superman Movieverse
The World of Lois & Clark
Richard White to Lois Lane: Lois, Superman is afraid of you. What chance has Clark Kent got? - After the Storm