There are no and will be no players like Messi. At best, a few decades. I don't think RM fans are so happy with the player's departure from Barcelona, because mostly over the past few seasons he has been characterised by goals against weak teams (hatafi, betis...). In El classico, Ronaldo and Messi weren't very productive, but it was always interesting to follow the game..
Talking about El Clasico, I think this year will be a little different and will not be the same as in previous years.
last season there was actually something less than the elclasico apart from the departure of ronaldo and Pepe from real madrid and the absence of Suarez in the Barca camp and this season I think his enthusiasm will decrease because at barca there is no messi and at RM there is no Ramos.
believe it or not for the previous few seasons elcalsico became exciting because of some of these players