I see Johnson as more of a Z and Fountain as a slot.
If I'm not mistaken, Johnson's big game last year right before he got hurt was as the Z. Though I could be wrong.
Also, I see Fountain as Reich's Agholor in the slot, but a bit more athletic.
Rogers puts on clinics in practice making DB's look like they're on skates, but that rarely (if ever) translated to game day. To me he is a JAG.....a reliable one, but a JAG nonetheless.
The best player for the team will earn the spot. He and Pascal will have to outshine the size/speed guys that Ballard drafted since Campbell can return kicks.