Instead of arguing what should not go into the Great Indoors space, maybe the discussion could be about what could go in instead. With such a tremendous space, something like a SkateLab would be a nice fit.
We do not need more retail space. Burbank has a nice selection of department stores and mom-and-pop shops, why crowd in Walmart? The skaters of our community would enjoy a safe place to hang out and their parents would appreciate not having to drive to Simi Valley.
This space already has a nice café area where the parents can relax while the kids have fun. Since it is a bit larger than the facility in Simi Valley, maybe a party area could also be incorporated into the space.