Rumored Smash-style crossover game to star WB characters like Shaggy, Batman, and Gandalf

On the one hand, I'll believe it when I see it. On the other hand, something as cynical as a "Smash Warner Bros." game inspired by the Powerful Shaggy meme is exactly what I'd expect from the company responsible for Space Jam 2. 

This rumor began with a post on GamingLeaksAndRumours that claims a crossover platform fighter called Multiversus is in development, and it will star characters including Shaggy from Scooby-Doo, Gandalf from The Lord of the Rings, Tom & Jerry, Batman, Fred Flintstone, Mad Max, and Johnny Bravo. 

"I was told that the origin of this game was actually due to the memes based around Shaggy getting into Mortal Kombat in his 'Ultra Instinct' form", says the post, which links to a trademark application for the name Multiversus as its only proof. The animated film Mortal Kombat Legends: Battle of the Realms did feature Shaggy reaching out of the Warner Bros. logo to grab Scorpion in reference to the meme, so I guess people at WB must be aware of it?

The post also claimed that NetherRealm would be the developer, which was disputed by patron saint of videogame leaks Jeff Grubb. Grubb tweeted, "This WB platform fighter is real, but it is not a Netherrealm game. Come on."

If that's true, and NetherRealm are instead busy with Mortal Kombat 12 or whatever, then who would be up for developing this? Hopefully someone who gives it a better PC version than the shoddy Nickelodeon All-Stars Brawl port. Riot Games do have that League of Legends fighting game codenamed Project L coming up, maybe the reason they've been so quiet about it is that they're pitting League of Legends characters against Shaggy and Batman, Marvel vs. Capcom-style? Honestly, after the Dune/Fortnite crossover, who knows what someone in marketing is going to green-light next.