But what about «the witcher», how does that compare,  as both pacman and megaman and sonic is the name of their respective franchise?

Much higher, i just did the comparison and it's about on par with Pac-Man 

The first game was... not good, let's just say that. I played it because I didn't have Smash Bros back then, but releasing a sequel right after Smash 5 doesn't seem like a good idea. They need to re-do everything. And as much as I love Ratchet, Kratos, Sly and other PS characters, there's just something wrong about the first game.

It should just be called "All Stars" without Playstation on the title, it is too "clumsy". Smash Brothers, does not have NINTENDO on the title!

agreed. tho Sony just doesn't bother with spin offs they are always cheap as hell. 

Yeah, as much as I liked the idea - execution was poor. I'f like to see Crash and Spyro enter the fray, though. I've been enjoying replaying the originals on PS1 while everyone is going bananas for remasters.

https://youtu.be/by0y-Jo8yNA  - This setup really gets you sharp pixels out of the ole' PSX.

A good point. Favorably:

https://trends.google.com/trends/explore?q=sonic,geralt,pacman,megaman,%22the%20witcher%22

The Witcher is based off of a series of books, yes? I imagine this would give the term/s "witcher" and "the witcher" a boost.

don't you think it would be in the font and text style that the original game had? That would be more believable

Can't we get a kart racer instead? 

I do think Sony Japan is working on a game. the chances of it being this is 0%. this is just some maniac with a spam "make all stars squeul" twitter account posting this.