Absolutely disagreed with you in this. You shall never use pre season result to forecast their future. You don't know whether they will play with the full squad during the pre season. We may be seeing some juniors to take a chance in the pre season. The better for you don't take the pre season result seriously. There may be the adjustment to happen in Leverkusen's squad as well. Impossible to believe pre season result will determine their future due those reasons.
Sure! Preseason matches are not a determinant of what the new season will look like. We've watched teams playing excellent games during their preseason outing but they fumbled when season starts. Preseason games gives the coach a privilege to test series of formation and their players ability, strength and weakness to know which area needs to be improved and work on before the actual season begins. Young players in the squad are usually given a chance to showcase their talents during preseason. Not only Leverkusen, every team should not be judged by their previous season performance and not even by preseason result.
Based on today's match map, I can see they'll be playing against Flamengo U-20. Bayer Leverkusen will likely field their reserve and youth squads. This will be just a training match for them, so whatever the outcome, it won't be decisive. Playing such a match in the Brazilian training camp will simply be a test match for them.
In this match, Leverkusen is better with its good performance but this will be a lesson for the opposing team from which they can gain experience to play well and they can know that to become a good and strong team it takes hard work and struggle. They are strong so they will play the match with their full form but they should not play the match considering this as a weak team but should play the match in their real state because for them the victory should be the same as they get in normal matches. This is a useful match for them they will get to learn a lot from this match which they should not waste but use in a good place.