That is an interesting way to look at things, for sure.
The last we saw of Ruzek in the finale, he was staring down an (I’m sure) angry as hell Voight in an abandoned factory’s parking lot at night after having been driven there by Olinsky under the guise of meeting a C.I. The episode craftily ended before we could see or hear any of the confrontation that’s to come between Voight and Ruzek, but I can imagine that there will be some super tense moments coming up as the young detective tries to explain himself to this man he’s come to consider family, and whom he knows to be super dangerous especially when pushed.