Marqise Lee and Allen Robinson figure to be involved heavily in the offense immediately, with Lee at the "Z" receiver spot (flanker), Robinson at the "X" (split end) and 2013 draft pick Ace Sanders the primary slot receiver.
They'll have competition, but two of the three could end up in starting trio — along with Cecil Shorts — when the Jaguars open up with the Philadelphia Eagles in Week 1 on the road. Lee also said he has worked so far in a few formations and a few motion packages where he can end up inside, although he's primarily learning the "Z" spot for now.
This means that Robinson would be competing with the underrated Cecil Shorts for playing time at the "X" spot in the offense. It appears that Lee has an easier path to starter's snaps playing the "Z" position.