Lately Schalke are always trashed by Bayern Munich with a high score. I remember the 8 goals in the beginning of the season before the previous one and 4 goals scored in another match. It will be quite surprising and evil if Schalke could be the cause of Bayern losing the title. I don't expect that to happen.
It's always trashed but it's in the past. I think that schalke is now trying so hard to avoid the relegation zone by winning the game. It can be seen from how schalke was able winning three matches from five matches. Bayern shall be careful with schalke. I knew that if schalke had very bad head to head against bayern but this club potentially to raid bayern's chance to win the trophy this season.
Bayern must have avoided the draw as the result from the match if tuchel still wants its club to get bundesliga trophy this season. Tuchel shall be worry about any trap that can occur anytime.
Schalke need the victory to stay away from the relegation zone and Bayern Munich need it to stay above of Dortmund. We will see how it will end 
The gap between schalke with some clubs in relegation zones is not so big right now. Bayern is fighting for title while schalke for relegation zone. These clubs hve their own target. The result of this match will determine everything. That means there are only two matches remaining after this.