The finals of Copa del Rey will be like a clash of the titans. Barcelona would like to win it, let it be two trophies they are lifting this season(LaLiga and Copa del Rey), while Real Madrid would like to battle it out for it, let it be the trophy they are holding onto currently because they don't what lies ahead for them in Champions League and the LaLiga, whether there is possible position for them to lift any of them.
It's hard to say because Real Madrid and Barcelona are the two bulldogs of Spain who don't like treating each other lightly when they have a clash. They will unleash the dragon in them on that fateful day of clash(finals).
Yea this match will be a tough one, as a bettor I wouldn't want to predict this match because it has a high level of uncertainty surrounding it, both teams are like equals so it is very much impossible to predict who win here, for me this match might likely end in penalty because this is a cup match which both teams may want to win by all possible means, Madrid is in mis form, Barcelona is not doing bad but they can also be faced with surprise in this game.
As I have said already, this match May likely be the survival of the fittest but the thing is a winner must emerge, having said that and viewing this from another direction, Barcelona have been able to prove that they can win the laliaga title race, with all the financial crisis that rocked the team and still they were able to reach this level, they are strongly contending in the 3 important competitions, if they eventually win Real Madrid in this Copa del Rey finals I won't be surprised after all they have defeated them twice this season and they can still do it again although the end of the game will tell.