My ideas for reinvisioning the museum

What I would like to do is encaptulate the building as a model and alter it in a way that I ave never seen done before. My vision is that basically, the first museum which was designed by frank gehry, received such a well reception that the museum could not keep up with the amount of people wanting to display thier art within its walls. So what I am looking at doing is mirroring the building, then constructing a glass terrace, and bridges that will connect them.

I am a fan of symmetry, so I will create an axis line beside the existing building and mirror everything, to its side. Maybe meld them together? still in the designing stages at the moment.