[quote=@Ever Faithful]
Does anyone know if Mr Freeze has his secret lair? I'm trying to find it online but nothing specific is popping up. I would have to start him at Arkham Asylum. I wonder if Nora is with him or placed somewhere secret
[/quote]

I mean that's all up to you. Just cause he doesn't have anywhere listed canonically doesn't mean [i]you[/i] can't make somewhere. You could always have Nora being cared for by Wayne scientists, that gives you a potential reason to cross paths with a Bat-Fam member.