I can't imagine how lonely the El Clasico would be without Messi and Ronaldo. Totally unforeseen circumstance occurred in Laliga and Barcelona before the new season started.
Looks like there must be a new star to fill both clubs. We worry too much about losing Ronaldo and Messi, and maybe it will happen soon. In 2-3 years they may not play again due to declining physical factors. For now maybe La Liga will not be as attractive as it used to be. But I think Barca and Madrid will get new stars, but I don't know when.
If I admit when Ronaldo left I had lost a bit of interest in seeing La Liga, then Messi left, that made me even more disappointed.