The sense I get from the rumors is that the team REALLY wants a cost controlled SP, but if they can't make that work they'll pivot to a monster reliever.
So like, making up names for effect, Plan A would be Edward Cabrera and Raisel Iglesias, while Plan B would be Merrill Kelly and Griffin Jax.
If you start seeing the Cubs more hotly connected to the primo closers, IMO that means be prepared to be disappointed on the SP front.