I'll go first:
NAMCO VS TROMA
Another crossover fighting game. Based on the SC4 engine, the game would pit many Namco characters (no Bandai characters, sadly
NAMCO characters (WIP):
* Nina Williams (Tekken series)
* Kazuya Mishima (Tekken series)
* Voldo (Soul series)
* Astaroth (Soul series)
* Nightmare (Soul series)
* Pac-Man [SECRET CHARACTER]
* Ms. Pac-Man [SECRET CHARACTER]
* Ki (Druaga series)
* Gil (Druaga series)
* Klonoa [SECRET CHARACTER]
* Rick (Splatterhouse series)
* Kalas (Baten Kaitos)
* Xelas (Baten Kaitos)
TROMA characters (WIP):
* Toxic Avenger
* Noxious Offender [ALT OUTFIT for Toxic Avenger]
* Sgt Kabukiman (ironically, Troma collab'd w/ Namco in his creation)
* Evil Kabukiman [ALT OUTFIT for Sgt Kabukiman]
* Apocalypse, INC Executive (Toxic Avenger series)
* Spike (Class of Nuke 'Em High series)
* Gonzo (Class of Nuke 'Em High series)
* Muffy (Class of Nuke 'Em High series)
* Prof. Holt (Class of Nuke 'Em High series) [SECRET CHARACTER]
* Adolf (Surf Nazis Must Die)
* Eva (Surf Nazis Must Die)
* Eleanor "Leroy's Mama" Washington (Surf Nazis Must Die) [SECRET CHARACTER]
* Chicken Monster (Poultrygeist) [SECRET CHARACTER]
* Tromie the Squirrel (Class of Nuke 'Em High series) [SECRET CHARACTER]
SONICXMARIO
Combining elements of both games. A warp pipe has popped up in Station Square and a meeting between Eggman and Bowser leads to a team-up, and now, robots, Koopa underlings, and Robo-Koopas are terrorizing Sonic's world. Now, Sonic and his friends team up with Mario and his friends to stop the unholy alliance between Eggman and Bowser.
Playable characters:
* Sonic/Mario
* Tails/Luigi
* Knuckles/Toad
* Amy/Peach
* Shadow/Wario (unlockable)
Gameplay: Play as a team-up between two characters. For example, as Sonic and Mario, you can utilize Sonic's speed and Mario's jumping prowess. There are also special team-up moves that you can use (i.e. Shadow can dash at lightspeed while holding onto Wario and the letting him go, causing him to fly great distances; Amy can fling Peach to high distances with her Hammer and Peach can glide with her parasol; Tails can airlift Luigi, who can buttslam; Sonic and Mario can combine their speed and jumping prowess, respectively, to jump great distances).
KINGDOM HEARTS 3
Now naturally, this is gonna happen. And here's some new worlds I wanna see:
* Power Rangers, preferably Mighty Morphin and SPD (the latter is the only Disney PR series I actually liked)
* Wall-E. The Heartless has turned Wall-E's planet into a wasteland by stealing the heart of BNL's president. Now, Wall-E must team up with the hero (Sora?) and his associates (Donald and Goofy?) to fight the evil Autopilot aboard the Axiom.
* Dragon Quest. 'Nuff said.
* Gaia of FF9.
* Chrono Trigger.
* Enchanted. Switch between New York City and Andalasia as you stop the recently resurrected Queen Narissa and The Heartless from conquering both.
More to come.