That's a pretty big "might." End of the day infringement is infringement and the winds can shift as quickly as a new person is hired.
Yes, we don't know anything about what the motives of CBS or Disney to do things or not to do things and therefore it is all speculation. I find it reasonable that big companies don't care as much for petty things as for large matters. Everybody does and everybody makes a decision about what is petty and what is not. And therefore I am not surprised that not every PI thing possible is pursued.