Someone giving you a bad reference, or refusing to give a reference, because you won a legal case against them is generally the kind of thing that could get another legal case started.
On what grounds? If the previous landlord gives truthful reference (i.e. no slander and nothing illegal) when asked, including the trouble they had to go through to evict you, there's nothing to sue them over.
But that information alone would be very useful input for my decision on whether to lent to you or not.
Someone giving you a bad reference, or refusing to give a reference, because you won a legal case against them is generally the kind of thing that could get another legal case started.