Given that Battistelli ignores all court judgements against him, seemingly with impunity, what will it matter how the court rules?
This one he cannot ignore. If it goes against him it de-ratifies the convention which is the basis of him being in office.
Additionally, if memory serves me right, one of the other cases is his (so far) successful claim that he is above German law including labour law. This once again goes against German constitution which states that the ultimate law of the land is the German law and no other law can claim supremacy.
Even if the first case somehow (I do not see how) fails, the second will pretty much get him fired outright under German labour code. There and then.