8) Avatar character can wear multiple rings in order to customize moveset the way they want. Certain fighting styles / moves are only available by wearing certain rings. And yes, their stats would be affected.

9) The avatar mode would still be 2-vs-2, and once you start learning a character's fighting style, you can choose that character as a tag team partner right away.

10) For fighters with extra body parts, the avatar would create said body parts with light constructs. For example, Bleez, the avatar creates light wings. And yes, if Brother Warth uses his trunk for certain moves, the avatar would give themselves a construct trunk while using his style.

11) Avatar appearance fully customizable (much like SF6). Clothing mostly corps uniform type stuff (having the logos), but there'd be a wide variety. Power armour, spandex bodysuits, pants, skirts, dresses, even bikinis.

I doubt DC / WB would be up for this right now. The Injustice series is their big DC Fighter right now. Not to mention their new strategy to avoid doing AAA titles. But I still think this idea has some potential.

So, what do you think? Critiques? Suggestions? Ideas?

I do not think there is enough diversity of powers to make this interesting. It would be like Street Fighter if you could only choose from Ken, Ryu, Akuma, Sakura, and Dan. They effective have the same power set. Sure, there may be some minor differences, like who is stronger, who is faster, who is more resistant to damage, etc. but that is not enough to make it interesting. This would appeal to a subset of players who are fascinated by the game mechanic who also really like the Green Lantern Corps. But your choice of character in a unitard with a power ring is not that appealing to anyone else. Street Figther is fun, because along with Ryu, there is Chun Li, and Blanka, and Dhalsim, and Honda, and Zangief. You need levels, ups and downs. There needs to be characters who are not Lanterns.

Like @Adam said, you should probably add some non-Lanterns. Guy Gardner from his Vuldarian days, Hank Henshaw, there's a ton that would make sense. Even some that don't!

Thanks for the feedback. Yeah, I get this is definitely aimed at the GL fanbase, and would appeal mostly to that niche. Hence why I'd consider "deputy corps members" (like the aforementioned Batman, Flash, and others, like Wonder Woman). They wouldn't necessarily have to wear the specific corps uniforms, just the rings (as an indication of what corps they're part of). 

As for the power set being "too similar", that's easy enough to keep varied if you look at not only previous video games, but also the comics. Yes, the corps focus on the energy constructs, but the constructs they use are all as unique as the users.

For starters, compare Hal to how he was MKvsDC, Injustice 1, and Injustice 2. He's practically a different character in each one.

Then you've got the villains, Sinestro and Atrocitus. The former is a full zoner, while the later is a rushdown character who barely uses any constructs.

Even the GLs are different in the comics. You've got John Steward who focuses on complex creations (with all the internal parts), like overpowered guns. Then, you've got relatively new member Caolán Shepherd, who focuses on high fantasy type stuff, relying on things like daggers and swords.

I compare this to the aforementioned DB FighterZ. Yeah, many of the characters use many of the same ki blast attacks (almost everybody uses the kamehameha in some shape or form), yet the developers all found a way to make each character feel unique. (RIP Akira Toriyama).