Short answer, no. Long answer, you can just not build any of the new xpac buildings. The way the futuristic stuff works is that when you build something from Cities of Tomorrow it creates a radius around that building which turns all RCI into futuristic buildings too. So, if you just refrain from building stuff form CoT you will be fine, however its not so clear for new players which items are from the xpac and which are not. To be fair, there isn't much from the xpac.
