The Slammiversary theme song is "Come On Get Down" by "The Listening".

Speaking of Slammiversary, it will be the first wrestling PPV held at the Municipal Auditorium since WCW Superbrawl Revenge 2001. WCW Starrcade 94 & 95 and Music City Showdown 89 were also held there. The venue when set up for a wrestling event holds aprox. 9,000 fans.
Well I don't know the song or the band but perhaps they are more famous in USA. And if not, this will be nice promotion for them. Although Fozzy would make a better choice lol