I don't know whether we will win or lose, but I think that we will play like a crap in the 1st half with Neymar-Arda-Rakitic together on a field.
Neymar is not good in general in keeping the ball and playing our classic possession game.
Arda is poor when he plays in midfield.
Rakitic imo can't run anymore.
Busi-Arda-Rakitic midfield, ouch.
I expect that we will get overrun and that we will struggle in build-up and movement.
Without midfield support, Messi will play in the middle, and on the right Roberto will run up and down without doing anything in attack.
Rakitic can't run too much, plus he will babysit for Roberto (who won't do anything in attack), plus he will need to help in covering the right side since Messi won't be there.
About the result, anything is possible.
We may win easily 5:0 after an individual effort, or we can play 1:1 due to this midfield lineup.
But I am extremely doubtful that we will have a nice fluid attacking build up play with this midfield trio+Roberto as a RB and Neymar at LW.
So, let's see...