After the surprising success of The Matrix, the cast of the odd little cyberpunk film became overnight sensations, and Neo (Keanu Reeves), Trinity (Carrie Anne Moss), and Morpheus (Laurence Fishburne) would go on to appear in both sequels, The Matrix Reloaded and The Matrix Revolutions. Those who haven't "taken the red pill" since '99, however, would be forgiven for forgetting another actor who lent his talents to the original film—namely, Marcus Chong, who portrayed Tank, the operator of their vehicle, the Nebuchadnezzar.
Although Tank survived the events of the first film, the Matrix pilot apparently died during an unseen mission prior to the sequel. The specifics of his death are never mentioned outright, but fans speculate that he likely succumbed to the Lightning Rifle wound he received during Cypher's failed one-man mutiny. To add insult to injury, Chong's character was replaced with an operator named Link, an apparent brother-in-law to Tank.
Rumor has it that Chong was set to appear in both Matrix sequels. However, he demanded a much higher salary than that which was specified in his contract. Suffice it to say, things didn't work out.
After Chong was let go, he claimed to have crashed press junkets, stolen food from production offices, and crank-called the Wachowskis. He also accused the siblings of calling him a "terrorist." Oh, and he straight-up sued them for going back on a promise to let him appear in both sequels. So it looks like he didn't take the firing lying down.