How much of an in-continuity book is S/B these days? I hear conflicting reports. Obviously the early arc with Supergirl and Lex's Presidential downfall are but then you have Bruce being alive in this title and Lana Lang acting completely OOC by trying to kill the man she still loves, his cousins, his son, his dog by releasing Kryptonite into the atmosphere. A fact never brought up in the Supergirl books where she is a major supporting player and mentor.
If S/B has its own continuity now they could probably introduce Terry safely without it affecting other storylines.