I'm actually really excited for the game, not just because of the game itself, but also because of the Implications of this game succeeding. Most other Smash Clones are either Niche (Usually due to lack of Brand Recognition), or the Game was Lackluster in alot of areas. I think this game has the most chances as Succeeding, and if it does it's definitely going to be the first major step to challenging Smash in the Crossover Platform Fighter department
Here are my thoughts on how the game is gonna play out, as well as my thoughts on some of the Speculation
-Character Roster around 25 characters or So. I don't see 30 characters, and especially not more than that. Remember that this is a First game of it's kind
-Regarding the Box Art, Catdog, Aang, Korra, and Ren and Stimpy already seem to be agreed upon.
The Girl on the Right I believe to be Dora, probably based on some sort of mix of the Movie version
The Blob with the Foot is most likely one of the TMNT Turtles, with the Shell and the Foot. The Foot matches. Plus considering how Big TMNT actually are, I really doubt they'd be missing from the Box Art, as otherwise there's no other spot for them
If Ren and Stimpy are counted as Separate, this would put Roster at 20 characters currently
-On the topic of the Turtles, I actually do think that Leo and Mikey are the only ones Playable in this game. It's a bit of an hot take since having only 2 of the TMNT Turtles is really weird, but I think considering Donnie being in the Background, and that one statement about characters not being chosen in sets, this might be what will happen
-Rocko Modern Life is the only Franchise from the Kart Racer not to be shown off in the reveal or the Boxart (Not counting Jojo Siwa here). I'm unfamiliar with the show, but I think this might be represented with Rocko I assume
-Jenny XJ9 will most likely be in. She's a niche character, but she's also popular and Nick has used her in the Mobile Super Brawl game, as well as previous Super Brawl Games in the past. She's also made for a game like this
-Timmy and Jimmy SHOULD be obvious additions to the roster, but there's also a likely chance that they might actually miss the boat on this one
Both have not made appearances in the Kart Racers, and Jimmy was not in the Mobile Super Brawl game (Timmy at least was)
Regarding Fairly Odd Parents, apparently Using FOP requires alot of Royalty fees that must be payed to Butch Hartman, which Nick might not want to deal with. This is likely the reason Timmy has missed out in Nick crossover games (like the Kart racers) for long while. Danny Phantom in comparison has nowhere near the amount of fees considering the Franchise isn't as large, and is why Danny makes appearances, while Timmy sits out
The one thing I will say is that FOP is apparently getting some sort of Reboot, though it's not focused on Timmy. Still it should be something though
Jimmy is an enigma though. I understand that Planet Sheen bombed, but I would think the legacy of the actual Jimmy Neutron Series would at least carry on.
I think Timmy has a better chance than Jimmy, but I wouldn't be surprised if both missed the base roster.
-Ludocity and Game Mill were said to have made the suggestions on the roster, though with the Comments about Alex Mack and Fanboy and Chum Chum, it does seem that while Nick is largely letting The Devs choose the Roster, Nick has the final say on whether a certain character gets into the game, and they have their own stipulations
On the Fanboy and Chum Chum Comment, The Dev said that if Ludocity made the picks, there would be some picks, so I think that comment does suggest that while (at least Ludocity) made some Deep Cuts in terms of suggestions, I don't think Nick is going to allow super out there picks on the roster, at least for this game
Oblina and Nigel Both got in though, and they come from Series that Nick probably doesn't have the most mindfullness of. I think though because they come from the 90's era that they might have it easier. Characters/Series from the 2000's like El Tigre, Back at the Barnyard, Mighty B, Chalkzone, etc are the ones I'm worried about
-I think 3 Reps is the most a franchise is going to get in this game. Characters like Squidward are probably going to be saved for either DLC or the Sequel
-Garfield is Definitely not on the Roster, as I Imagine he'd be on the Boxart if he was
-Live Action characters I don't think are gonna be a thing in this game.
-I don't think Gir is a separate character. If I had to guess, he's probably going to be a Special Assist character Zim can summon with certain input. I understand the evidence for him being separate, but the way they revealed him kind of suggests he's not his own character
-There will probably be some sort of Story mode in the game. Even Slap city apparently had one
Long Story short, I think Dora is the Girl on the Box Art, and that Jenny and Rocko are probably the most likely characters (Not counting Boxart or Official Reveal). I also don't think Donnie and Raph are gonna be Playable, and Timmy and Jimmy are maybes. everything else is up in the air for now personally