Make the DBZ Movies Canon
I've said it before - I love shonen movies because they're just MORE. More time with the characters we love with a bigger animation budget (most of the time).
Again, imagine being the kid that LOVES Goku in 1997, and you want to see him go all out. Goku only uses SSJ3 twice in the anime, but he uses it 2 more times in the movies. You get 100% more SSJ3 with the movies. (Gear 4th Luffy is in a similar situation)
Also, imagine if fighting was like sex for sayans. How many GOOD fights did Goku have in his adult life? Piccolo, Vegeta, Freezer... maybe Majin Buu? Then it's nothing until Broli, I think.
(What about Cell, or Ginyu or Raditz - If sex ended with you bleeding on the floor, you wouldn't call that a good experience. lol)
But add in the movies and you could count - Jenemba, Android 13, Cooler, Slug... maybe Turles. (Not to mention OG Broly) Plus, all the other ones that were victories for the other characters like Garlik Jr, Bojack, or... Broly. Come to think of it, they were mostly there to make Gohan (or Goten) look good.
(It's almost like they're subs for Goku, when Goku's not around.)
So, here's my ideas on what you could do with the movie villains to add them to the canon in some capacity. Some would be big changes, and other tiny changes.
One big change up would be starting with Dr. Wheelo. Make him the LAST Dragonball villain. The set up is that he wants to be the World's Strongest. He should try to clash with Goku and his friends like 1 year after Goku became tournament champion. Because he's completely out of his debts as a DBZ villain, but he's just tough enough to give Goku + Tien, Yamcha, & Krillin a challenge. And Toei could just RETCON him in say that it happened. (Maybe make a TV special to show it.)
Next guy you gotta keep is Obviously Garlic Junior. He would make a great re-occuring villain for Gohan. Obviously, Dead Zone slots in pretty much unchanged into the anime right now. It's just a matter of who-meets-who when with Gohan/ Krillin/ Kami. I'd LOVE to see GJ capture Videl, or Pan, and he embues them with evil Energy and Gohan has to fight them but also save them.
Turles would require a major overhaul. The concept of the Tree of Might is AWESOME, but the fact that he's a random doppelganger of Goku REALLY stands out. Maybe we could change him to look like Raditz, and what I would do with him is I would actually put him in Universe 7.
This would be a NEW movie where Turles is attacking planet Salad. He hates that the Sayans are good guys in Universe 7, and so he's gonna use the Tree of Might destroy the planet, kill the vast majority of Saiyans, and he's gonna eat the fruit of might to power up. And... what if since he's ESSENTIALLY absorbing a bunch of different Ki, he triggers the Super Sayan God transformation in himself. Of course, it means Kale, Califla, Cabba, and like Goten / Trunks have to save the day.
Here's another great one. Lord Slug. I think they need to give him the Broly treatment. He needs a canon movie in Super. And he's def gonna be an interesting threat because now he can also borrow the new "orange" transformation. And this time, Goku needs Ultra Instinct to take him down.
They could also make him like an Evil Wizard. He's not just terraforming the Earth, now he wants to open up Earth's demon realm to unleash chaos because he feeds off of demon energy. That would also be an excuse to sideline Vegeta.
Meanwhile, Cooler only needs to be reconned into those two years where they were training to fight the Androids.
And then Metal Cooler can return after Majin Buu. In this new version, both Goku and Vegeta can go SSJ2, and Goku can say SSJ3 just burns too much ki.
A weird one would be Super Android 13. I think he works as a Terminator homage. (Like 3 robots just show up at a mall wanting to kill Goku) But there's NO WAY to make him work. There's no space where we can keep Goku, Vegeta, Trunks around. So i'd place him somewhere else...
The only place where he would make sense is in "The Great Saiyaman" Saga. Ya know, after the timeskip, but before the Buu Saga starts. So, it would be Teen Gohan, Goten, and Trunks (and Vegeta / Piccolo) taking him on. With Gohan going SSJ2 for the win.
(That would be great since Broly 2 is definitely on a dead timeline.)
Obviously, Bojack slots in almost completely unchanged. This is after Cell is dead. There's nothing stopping Toriyama/ Toyotaro/ Toei from saying it happened. Another WIN for Gohan.
BTW, they could also redo "Bio-Broly" and instead of being a clone of Broly, it could be a clone of Bojack. (Bio-Bojack)
Jenemba is a weird one. A big draw of the movie is seeing Goku and Vegeta have to do the Fusion. That means we'd have to add him to what is now the end of the "timeline" after the canon Broly (/SH) movie. This does mean that neither Goku or Vegeta are dead, but that doesn't matter much.
They could start off by letting the dead warriors like Pikkon and Olibu fight. (Or maybe a team of villains taking on Jenemba for time off their sentence or reincarnation, like Cell or Bojack.)
Then Jenemba reaches his final form and the path to the living world opens up, and we get the chance for Gogeta to win the day.
Finally, there's Hirudegarn. Again, he slots in without a problem after Majin Buu.
But really finally, there's one more antagonist that needs to be added to the official Canon and that is "Baby." What makes him great is the body-snatcher/ body horror aspect. He's a synthetic alien parasite.
They could change him up a little bit. So that he's not made by the Truffles, and instead he's made by the Cerealians. He was a bioweapon they weren't able to implement before they were wiped out.
It's main plan is to destroy Freezer and his empire. So, Baby starts in space until someone like Jacco accidentally takes it to Earth. It be best to make it TWO movies. One where Baby takes over, and then a last desperate band that has to take on Baby Vegeta with Ultra Ego.
