The WMS Time Extension for the Map Viewer is hardcoded at the moment for the WMS time sample data. So at the moment there is no possibility to add WMS Layers with time support and use the map tools dynamically for this specific layer. For the Oil Spill scenario I adjusted the map.js for the ncMWS, which serves the oil spill data.
Are there any plans to extend the implementation for a dynamic wms-t support?