Without doubt, Bayern Munich stand a better chance to win today's opening game against RB Leipzig. Bayern Munich is the defending champions and would be playing at home too. Bayern dominance in the Bundesliga is not likely to be threatened not by Leipzig who finished last season in a very disappointing position. Leipzig with a new coach might want to impress their fans but I don't think Kompany men will give them a chance to do that. I don't know what the final scoreline would be but I expect both teams to score a goal.
Bayern Munich has a chance to beat everyone, they are favourites in any game they play in Bundesliga, and yet they do not end up any season with zero losses, or zero ties, they always have a tie or a loss somewhere along the line. This is why it's reasonable to always be afraid, because while you do believe in this, that doesn't mean that we are going to end up with guarantee for a win so you should be careful.
I remember once, I bet 5 dollars, just 5 dollars, for some stupid parlay, which had 11 games, and return was 800 dollars for it, so it was a crazy bet and I did not expected it to win. Do you know what happened? I was right on 10 of the games, and lost one, and the one I lost was Bayern Munich getting a tie against Hoffenheim. Bayern had less than 1.40 odds for that game, it was near guarantee.