I do not think that Atletico Madrid will pass Barcelona, that would be a bit too much. I get how it looks like Real could do that, it's clear that Barcelona had a bad period and they are hoping to get better results, but it would be very very tough for ATM to pass Barcelona, that would require both teams to keep their momentum for a while longer, Barcelona to keep losing or getting draws, and atm to keep on winning more and more, that seems like unlikely if you ask me but of course it's football, anything could happen.
Not that I love Barcelona too much, I am neither Spanish nor catalan, so I don't care, but I do hate industrial football and the "pay to win" aspect of it, so I would rather see Barcelona win this season than Real Madrid.
Football is full of entertainment, if Atletico Madrid do that, that's one of the entertainment many people are looking forward to see. Trophies are not family business but collective competition for everyone to have a fair opportunity to win. If Barcelona and Real Madrid don't act up like the best, they will get over lap by another team and that will be the last time they are going to test that first place in the table, Girona almost buried the two teams last season but their performance kind of changed later.
Real Madrid are the closest to winning this trophy but they are not well organized, a lot of injured players the team are used to and they are now managing how they are going win any match that comes their way. Look at the state of the teams individual performance, they are not it and I'm afraid that this is how they are going to play from now on until the end of the season, too much injuries wouldn't allow them win matches.