@Lithium Well the first thing is that my game is going to have a pretty easy to control progression using the DICE system.
The second thing is that a part of the entire reason I even chose DBZ as one of the foundations for this game is specifically because of how necessary it is to make sure that progression is very tightly figured out by day one.
I intend to start off characters relatively evenly, with the exception of support characters. Major FCs like Goku or people from the other three themes I added, are differentiated in their specialness by the fact that they have certain special things built into their narrative. I think that's more than enough, they don't need like a massive sheet lead or whatever.
This is definitely not going to be comparable to MCM or whatever, the progression will very much be codified and I'm essentially crafting this game around my GMing style.
I'm not one for predetermined narrative. At best I come up with three possible endings for a particular plot, and even those aren't a guarantee. So if someone is playing a major FC and they're slacking, I'm not gonna handwave and tell Krillin "Sorry, you're working too hard, get back in your box". If Krillin ends up the goddamned savior of the universe, that's Goku player's fault for slacking.
I should just say right now that the world is being made up of DBZ, Sailor Moon, Naruto, and Yu Yu Hakusho. This might seem random, but I have my reasons. DBZ is still the foundation of much of this, but, well, let's just say that this isn't going to be a world that takes itself so seriously that I'm gonna beat people with a stick for not wanting to follow the canon plot of their character.
I intend for any super transformations to be more or less on par with each other at each level, but I also don't intend to make everything perfectly balanced either. That said, if a super saiyan is being a dick, then team up and beat the shit out of the super saiyan.
This will also not be an explicitly PvP game. PvP will certainly exist and be a big part of the game, but I'm gonna have stuff like villain slots, and on average hardcore villains are gonna often be more powerful than non-villains. The reason for this is that even if you do become uber ultra awesome saiyan #2, I want there to be a constant air of threat, and I don't want all the major villains to just be NPCs or whatever.
But yeah, not everything is gonna be balanced, but on the PvP friendly rivalry level, I don't plan for everything to be wildly uneven either. I'm still working out how the DICE system can be used to handle new players in the long-term, and how power bloat can be handled, but I'll get there.
edit: Since this is an alternate universe, based on the premise I set up (subject to change), I also made Planet Vegeta a thing again. Why? Because I'm not gonna be like one of those dickish Star Wars MUs that's like "Oh, only a select few people can be a Jedi". If you wanna be a saiyan, be a saiyan. I also explicitly state in my document that anyone can do an OC Sailor Senshi. So, there ya go!