I just pushed the Xevious upgrade to MonoGame and Visual Studio 2015.
PiscesMike had difficulty with a compiler error using 3.5.0, so you probably need to upgrade to MonoGame3.5.1 to get it to compile. Once he switched to 3.5.1 it worked fine.
Please download and test building the scenario. Let me know if you have issues as we can try to iron out before Saturday.
It only took about 30 minutes to switch from XNA to MonoGame, so actually really easy. Only labor-intensive part is adding everything individually to the MonoGame Content Pipeline.