Tim Drake - Batman Beyond ( Future's End)

Can somebody PLEASE fill in the blanks for me. What the heck happened to New 52 Future’s End Tim Drake after returning the mantle of Batman to Terry?? He just disappeared! Any insight is welcome

You answered it for yourself. He just disappeared.

I like to think of it as the timeline correcting itself because Futures End was prevented and it never happened, therefore Tim would have never been in the future.

How old was older Tim in this series?