#5 Konnan and Vampiro
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The Canadian Vampire and Konnan had their issues dating back to Vampiro's debut in Mexican federation CMLL.
Konnan had been the star, but Vampiro went over well with the crowd and began to rival his popularity. Vampiro was offered a role in a Telenovela, but Konnan sabotaged him by telling the producers Vampiro spoke poor Spanish--which was the truth.
Konnan wound up gaining mainstream stardom, while Vampiro was left without a job. Their feud intensified when Vampiro's girlfriend told him Konnan had attempted to assault her. (Later it would be revealed that the assault never took place, and Konnan and Vampiro's paramour had a consensual romantic entanglement.)
Konnan wound up leaving for WCW, and a few years later Vampiro followed. Konnan allegedly tried to get WCW officials to rescind their contract offer to Vampiro, fearing there would still be bad blood between the two men.
However, time heals all wounds, and the two wound up burying the hatchet and claim to be on friendly terms these days.
Major rumor about recently released stars HERE