Hi and welcome to MJJC
..I love talking/researching about Tour stuff so I will do my best to answer your questions
1) Why Michael never took the Victory tour to Europe and all around the world in 1984?
~There were reports that they were going the Victory tour as a World Tour, but according apparently Michael had wrote Don King (The Tour presenter) he had no interest at the moment and he also said in a speech he was leaving group after the last show in Los Angeles. Michael said when he agreed to do the tour he decided to donate everything he made from it to charity...Also Michael had wanted to call this tour "The Final Curtain" because it was going to be the last tour with the Jacksons...So IMO, I'm not sure if he was too keen on doing the tour, but he decided to do it partly for his family and mostly for fans/helping people.
2) Why Michael never took the History tour to South- and North-America in 1997 (USA, Canada)?
~I'm not 100% sure on this one..Just IMO, but I think the way he was treated by American media and everything had just put him so off...Another guess is maybe he Michael felt he would focus on The Americas in his next tour so he did it this way..
3) Why Michael never toured in Canada as a solo performer in 1988-1989 during the Bad tour?
~Hehe, wellll...as you can imagine as a Canadian myself I do wonder about that. He could have easily sold out a TON of shows..I really don't know...This is just a guess, but maybe there was a certain restriction of some sort so they had to unfortunately cut Canada out of it...I wish I knew why, hopefully some day we will know for sure.
4) Did Michael plan to tour during the Invincible era (2000-2003) and later before This Is It?
~Yeah he did..I think 9/11 happening was the main reason for cancelling it..Which is really too bad because I love Invincible and would
have loved to seen those songs live.
5) Why Michael never rescheduled these 3 Washington, Tacoma concerts cancelled in 1988 as he did with LA ones in 1989?
Not entirely sure, I know those 3 Tacoma show were canceled after he came down with the flu..It might have been a case of he had to follow a certain touring schedule or it would have put everything out of place..He may have had other commitments to take care of, I can't say for sure.
Hope I helped