Selina was going to be the one to "clone" Bruce in Epilogue, but they changed it so Waller handled the biotech and Andrea "The Phantasm" Beaumont was going to kill Terry's parents for the psyche. Thank Rao Selina was excused from both roles.
I say she gave up on Bruce a long time ago and was sailing the Catamaran around the Caribbean at the time long after donating her DNA to Waller for Project Batman Beyond.