For Kim Possible, I'd have Yori becoming a supporting character as in moving to Middleton and ultimately teaming up with Kim and Ron from time to time in missions that doesn't necessarily be set in Japan or have Monkey Fist as the antagonist.
For the 1st live-action FOP "Grow up Timmy Turner" (it's live-action but since it's based on a cartoon, it's close but no cigar), I would have used Remy Buxaplenty instead of creating the character of Hugh Magnate and having the van then Timmy got as a gift from Jorgen, doing some funny gags more or less similar to that Land Rover from that 1980s comedy movie "The Gods Must be Crazy".
For Total Drama, a new season who could fix some characters developments back on the rails like Trent, Dakota and Ezekiel and/or having contestants who desserve a longer run in the season like Bridgette, Katie, Sadie, Sammy, Brick, Sam, Rodney.
I don't want a Playstation 5 for all of the new "next gen" games coming, I just want a PS5 so I can just play my PS4 games without my PS4 console sounding like a rocket engine blasting off. (...So tired of seeing the PS5's sold out everywhere....)