Yes, the Mandelsoft, on behalf of the entire ST staff, uploaded a Simcity 4 to SC 2013 converter for BATs. The only problem is that it requires a dependency called "humor.bat," so, in other words, it's a very well-thought out april fools joke. See for yourself: http://community.simtropolis.com/files/file/28611-4-to-13-plugin-converter/
Simmania