According to the latest sprint episodes the the maps for BTB are to be made in forge rather than new environments. Also seems some of the DLC arena maps are going to be remixes 
Every map is a fluffin forge map. I hate it. I want real, well designed artistic maps that look awesome and make me feel like I’m in a different place every time. Not just a different ramp to take or different walkway. Really, really disappointed in the maps. No wonder 18 maps will be free. They’re not spending true man hours coming up with incredible, memorable classic maps that we will remember for years and years. Just more forge maps that a few of the guys remixed. Wow.