I see a big opportunity and a possible mentality shift for Suarez as Messi gets injured, and don't get me wrong, I am sad about Messi's injury, but from the point of view of Suarez performance I think this is what he needed to bring back the beast he was before. (Yes, when he was at Liverpool he was better than he is now, last season he was good but not on his top form).
If you, like me, watched him when he played at Liverpool, you know what kind of a player he is and what he is capable of when he is the leader of the team. Liverpool's mentality was this: pass the ball to Suarez and let him do his thing, as long as we provide him passes we will win. And it was exactly like that, the reality is that Liverpool didn't win the cup just because the team was so shitty defensively that even Suarez couldn't carry them with so many goals they conceded.
Not saying that now that Messi is out he will feel like the leader of the team, of course there are still huge players here that Liverpool didn't have to compete with Luis, but maybe and just maybe... Suarez now gets confident and takes the team on his shoulders like he did with Liverpool, trying to find the net everytime and not trying to find Messi instead(like he does many times now at Barca, wasting clear shot chances just to assist Messi).
If this happens we will be fine even without Messi's help. Suarez is capable of this, he just needs to overcome his fears and get centered and he will take the role of main scorer that Messi had.