I really don't know who is going to win the next match between Hertha and Stuttgart. Both teams have been really inconsistent this season but if we just look at the stats I think you will find that Hertha has certainly been a little better compared to Stuttgart. So I am not sure and it is really hard to predict anything.
The painful thing about the two team is that they haven't been playing any important league since January, it has been all about Bundesliga but sadly that they couldn't make it to even ordinary Europa League.
Dortmund will surely finish Heartha with cool goals, but I'm not sure if that will demote them to relegation zone where Stuttgart is already since they are already having 3 points ahead and if Stuttgart manage to win cologne, they will still be having the same points but Heartha will be ahead of them on the table due to their goal difference.
RB Leipzig should win their next match really easily because it is against a team that is in the relegation zone and will be relegated this season.
Don't think about it, didn't you see what Brighton did to Manchester united? Because a team isn't in the top four shouldn't be taken for granted.