Man, this is tough. I'll go with linebackers, both inside and outside. It's not going to be easy to replace Littleton and Fowler (Clay Matthews is dead to me, fuck that guy).
I want to see if Jachai Polite or Jeff Holland can become solid rotational pieces like I think they can.
I want to see Ogbonnia Okoronkwo and Samson Ebukam become terrors off the edge with Leonard Floyd setting the edge and contributing.
I want to see if Justin Lawler can restabilsh himself as a starter.
I want to see if Micah Kiser can recover from his pectoral injury and become the solid contributor we imagined he would be at draft day.
I want to see if Travin Howard can become the force I think he can be and potentially replace Littleton after he flashed potential in limited time.
I want to see if Kenny Young can contribute after his no-show in next season.
I want to see if Natrez Patrick can become a force at both inside and outside linebacker.
I want to see if Troy Reeder can show more than he did in his snaps.
I want to see if the Rams decide to add a linebacker or two in the draft or whom they get as an undrafted free agent.
Linebacker gets my vote, even though we could literally choose any position.