Those tournaments Ronaldo missed games out for Portugal or played with one knee, because he tried giving his all from start to finish all season playing against Getafes, Eibars, etc. and other clubs not worth expending energy/his body on. Yeah, that's gone and now you got him choosing when he wants to score.
And this time he will be as fresh as he wants for the World Cup.
If you think he doesn't plan to give this tournament his absolute all, you haven't been paying attention the past few years, Never mind his career. If he gets another knee injury in the final this time, he will not leave that field. He will die on it. No Game will matter after this World Cup for his legacy and he has money that will sustain his family for generations beyond the eye can see, with or without playing.
It's his last shot to elevate what he's already accomplished and his only shot at the throne as the King of Football. And he'll do anything he can to attain it. Because its his nature. Because he shows this dominion nature in the Champions League, the most difficult competition in the sport's history.
And that level of impact he uses in the Champions League is all he’ll need for the World Cup. But he's going to bring more. This tournament will be Cristiano Ronaldo at his peak. Where he will refine the last bit of consciousness he needs to end up playing a game of football only he knows exists. And he can let the rest of the World laugh their final laughs, for they had decided long before Cristiano could show them, that he will never be better than Messi. And know he will have the last laugh. That he’s been the one laughing back at the world for years, even if he or they did not know it, and that Portugal's national anthem will be playing in Moscow on July 15.
Ronaldo captains Portugal to their first title while Messi can't even win an inferior competition like the Copa America. Twice. And he already lost a World Cup final. It’s not in the cards for him. Not by chance, but by destiny. It’s why he saved Portugal from going out against Hungary at Euro 2016 with two great goals and a great assist. Who scored the all-important first goal in the semi-final that led to Portugal's second final and first tournament win? Who scored the first all-important goal in the semi-final that led to Portugal's first final ever when he was 19? Who was voted by every publication the best Portuguese player (and by some, on the entire field) in his country's second only World Cup semi-final in 2006? In a team that had Figo, Deco. etc. against Zidane's France? Who, in some of the national team’s worst days, had their team require him to single-handedly even drag them to the 2014 World Cup? The answer to all the above is Cristiano Ronaldo.
And unlike that 2006 World Cup, he’s the leader now. He is the essence of the team and at the peak of his scoring ability. And Portugal has its best generation of youth ever (many already with the experience of winning a European Championship, including a good number that played a pivotal part). The amount of Portuguese talent spattered around top-level clubs is proof of this. And that means that this is the only chance Portugal has to ever win the World Cup, because a combination of Cristiano Ronaldo and youth talent will never happen again. Because there will never be another Cristiano Ronaldo. For Portugal. Or all football.
The pieces are good enough for Portugal to win a World Cup where there is no Great Spain or any team of comparable quality.
This World Cup will be an open competition.
And Ronaldo will take advantage of this. Like he ALWAYS does.
Talked about for years? 
