Everyone needs to be healthy, especially Kaepernick and the WR core. I'm glad we have enough depth at the wr position especially late in the season when Rio and Crabs come back, and its nice to see that Kap and Vernon are getting that chemistry and Vance looks to be an upgrade to Walker pass catching wise. The running game will be fine as always since we have Gore and Hunter with LMJ coming back in a couple months and a new and improved Dixon in my eyes. Defensively we need the pass rushing to be there consistently throughout the season, which is why I'm hoping for Fangio to switch up rotations to prevent fatigues and injuries from happening so the secondary will hold up its end of the bargain.
So basically we need everything to go our way for a shot at a superbowl again. Which is the case for every contender.