A bit off topic, but when you say Godai Yuusuke it makes me think of Maison Ikkoku.
With regards to the different versions of the rider world, I think one of the reasons why they are making the world different is that, if they try to make the different rider world the same as the original series, they would require the same actors who played the previous riders. Some rider actors may have already graduated from the tokusatsu world and thus are charging more for their talent fees. Modifying the other rider worlds would make the production less expensive, also, this would be the chance for the producers to remake the other worlds as to what they wanted it to be instead of what it used to be. Am I making sense here?