"Opening Stage (OST Version) - Mega Man X" is a high quality rip of the OST version of "Opening Stage" from Mega Man X.
At 0:01, parts of the melody change into the tune of John Cena's theme. At 0:09, other parts of the melody change into the tune of Snow halation. Later at 0:33, the melody changes into the tune of GO MY WAY!!.
At 0:44, it's a reprise of the music.