I really want another Avatar series. Last Airbender and Legend of Korra are great, but I need to see the next Earth Avatar deal with the 1930s-1960s world of submachine guns, atomic bombs and nuclear threat. Maybe even hints at communism, you know, considering how open LoK was to talking about politics in a way that made everything but democracy seem terrible. (I was happy to see an Oligarchy as the government in Season 1 and Season 2 took that away from me
It would be really interesting to see an Earthbender in such a metal reliant world. Metalbending is apparently possible for all Earthbenders, but for a many it is really hard to even learn. So maybe this is an Avatar who can master all the elements fairly easily, but just can't do the sub-bendings like blood, lightning, metal, lava, etc.
Powerpuff Girls needs a re-reboot. The old show promoted strong female characters who saved the day and kicked butt. But the new one is highly feminist, pretty much removes the entire male demographic from enjoying it, and there is much less fighting.
Come on! They're superheroes!
Maybe even Powerpuff Girls Z could get a reboot...
Futurama would be great continued. I think a good format for them could be episodes that can be watched in any order, about 11 minutes long. They wrapped the story up very nicely, I'd hate for them to touch it, so it would be cool if they still had the characters doing some cool stuff that didn't really matter that took place sometime before the ending. Could even be a show based entirely around deliveries to cooky planets and such rather than anything else like character development.
This one isn't so much any of the 3 types of things I mentioned above, so I'm breaking my own rules, but it would be cool for Pokemon to age Ash. Have him be the 15yo Trainer that travels around with two 10yos, like Brock did for what, 13 seasons?
They could have Ash be a main character still, this way they wouldn't have to reset his intelligence or Pikachu's ability (Like omg Ash, how can you forget how to catch a pokemon 5 times?). As they go through 8 years of two generations, they could have Ash escorting Protagonist A and B, then by 4 years has past, B is replaced with C. Like Ash, Brock and May, replaced with Ash, Brock and Dawn. A and B stay the same. Slowly, the lines go from an equal amount to Ash saying very little and Protag A being the main character. After 8 years, A could age and become the 15yo to another duo of 10s.
Finally, Ash can rest, return to Kanto, and become the champion. Who knows, maybe after Gen 6 gets a reboot, Gen 1 might get a second Reboot and Ash could make a return in that as the Champion who acts like Professor Oak or something being a bit dim witted and old but good.
X-Ray and Vav would be something I need continued. I wouldn't expect anyone here to understand but the voice actor for X-Ray said he was satisfied with the way Season 2 ended, despite it being a cliffhanger. It was like adult Powerpuff Girls + (Batman - serious) to mathematically define it.