I am not sure whether they will feature in the 2026 world cup. In case of Ronaldo there is a higher probability, but let's not forget what happened in 2022. Ronaldo was not even included in the playing XI for some of the knockout matches. So if he was not included in 2022, what are the chances of the same happening again in 2026? And now coming to Messi, he doesn't seems to be a lot interested in playing in another world cup. He has achieved all that he wanted. So there is no point.
Ronaldo was included in the Portugal team for the World Cup 2022 but Ronaldo was "correctly benched" by the Portugal Manager at that time because he did not like Ronaldo attitude when playing against South Korea.
And the current Portugal Manager Roberto Martinez will definitely bring Ronaldo to the 2026 World Cup as long as he is not injured.
Ronaldo has states that he is interested in taking part in the 2026 World Cup before he retire from football in 2027 later.
What Fernando Santos did was actually very detrimental to the Portuguese national team at that time because they had to reserve great player like Ronaldo, after all, Ronaldo was goal machine for Portugal.
But after Portugal failure, Fernando Santos resigned and now Roberto Martinez is the coach replacing Fernando Santos, so I sure whatever Ronaldo does will not leave him on the bench much.
Roberto Martinez understands that Portugal really needs Ronaldo contribution and substituting him would be the same as big loss for Portugal, plus Roberto Martinez still really trusts Ronaldo for every important competition in which Portugal participates.
I sure Ronaldo will take good care of himself and he will not suffer anything that could prevent him from participating in strengthening the Portuguese national team.
Seeing Ronaldo contribution while being part of the Portuguese national team is truly amazing and he is the player with the record for most goals, until now no other player has managed to surpass Ronaldo record.
Plus, Portugal now has several other great young players who will provide excellent performance for the development of the Portugal national team in the 2026 World Cup.