How and why did hulk higan come back in 2003?

Well Hogan came back in february of 2003 and started a huge rivalry with vince McMahon! which led to a Rock/Hogan II at no way out! after that Hulk did a match at wrestlemania 19 against Vince!(my guess is that's why he came back)The smackdown after wrestlemania Vince fired Hogan! this led to the transformation of Hulk Hogan Into Mr America! that was Hulk hogans last go around until 2005!