This track does not contain a traditional easter egg. Rather, alongside the two other matching tracks, their names are "Groundhog Begins", "Groundhog Returns", and "Groundhog Forever". This is a nod to the series of Batman movies, "Batman Begins", "Batman Returns", and "Batman Forever".
To find this egg, look at the titles of each track, then look at the titles of the Batman movies. Congratulations, you've found the egg!
As of yet, it has been deemed that this is a simple easter egg with no deep connections to anything else.
This section is reserved for Confirmation/comments about this investigation. Investigations will remain open until advised by Redlynx that the final solution for each secret is found.