One thing I like about collecting Lego CMF is that some minifigure will complete each other. Maybe as a couple or even a rival.
Mostly they can be collected as a theme, for example the circus crew and mascot theme.
Like this Series 11 Evil Battle Mech, it completed another mech guy from Series 9 CMF. Perhaps in another series coming up, there will be another mech, a female one maybe?
Anyway, for now I enjoy having them both riding dirt bikes that were taken out from Lego City set.