What area of design do I want to focus on?

After having thought a lot about where I want to take my individual project, my instinct is to design a site-specific version of the play Peer Gynt. I would like to do a speculative design proposal for a site-specific performance based on the play where the audience is lead through different spaces and is active participant in the performance. I want to play with elements such as puppetry, scale, video and sound. I still have not found a place where I would like the performance to take place. This has led me to what could be my research question for this unit: How might design for site-specific theatre encourage interactivity in an audience?