ESPN did a nice analysis of the possible candidates to fill Marcus Lattimore's cleats with the top options being Brandon Wilds, Bruce Ellington, Eric Baker, and Kenny Miles.
Look for Wilds to get a good chunk of the work along with Miles, who was the team's leading rusher before Lattimore arrived. As for Ellington, he is likely stay at wide receiver but will see snaps as the team's Wildcat quarterback.