Recently in an interview with Collider.com Jason Isaacs spoke about the upcoming films and the theme park due to open this spring. 

When asked about his experiences he replied,

Jason Isaacs:  Well, it’s very sad for me.  I was already nostalgic for the history of Harry Potter while I was still making it and I knew the end was coming.  It was two film…they made the last book into two films and it was a fantastic experience because everybody’s back…everyone who is left alive that is…and even some of the dead people.  There is nothing greater than sitting around on a Harry Potter set when you’re not filming and listening to the likes of Maggie Smith, Michael Gambon, Bill Nighy and Jim Broadbent tell stories.  And watching everybody crew the scenery up in the few moments you get on screen - trying to out ham each other is magnificent.  This big franchise goes out in an epic way.  But I was always cognisant of the fact that I’d have to pack up my little furry friend of a wig and stick it in a box and say goodbye to the cane.  All the joy was tinged with sadness for me.

The then also go onto talk of the theme park and the battle sequence in the last film. To read all of the interview, click here.