I was messing around in my editor and made this little bit of audio, a combination of the theme songs of ThunderCats and SilverHawks.
http://www.mediafire.com/?hblo5lvllzjfbrw
I guess this is what we might get with a crossover between the series. I might make a music video with it, possibly using footage from the 2011 series if the SilverHawks do appear in it, as has been rumored.
Enjoy 