Rip-off means "Something, such as a film or story, that is clearly imitative of or based on something else." 

Therefore, 

Please point out the elements of it being imitative those who agree it being a rip-off.

Also point out the elements of it NOT being imitative those who don't agree.  

Ok I'll bite.

I think it's definitely a rip-off.

ripped-off parts:

-Their mascot brawler is in 2D, just like Nintendos. Problem is, nearly all of Nintendos mascots have 2D roots so it makes sense to represent their mascots in 2D because people are familiar with them this way. Sony on the other hand actively discouraged developers for years to make 2D games on their plattform and like 99% of the fighters in battle royale have 3D roots. It makes no fucking sense to represent their "mascots" this way other than the convience of knowing how it is done (from Nintendo).

-The whole physics engine seems to be a massive rip-off. This is the part that really grinds my gears because they were really shameless with this one. The double jumps, the floatiness of the jumps, the way attacks impact other players just screams smash brothers. There is really no denying possible, watch that one side by side video and if you don't see it then you are blind, sorry.

-The whole visual representation looks like they really really want to attract Smash Bros. fans with this.

-Some of the characters have a really similar moveset.

-The fricken Developer had a Wii hooked up to a PC in one of those Webcam shots or whatever that was. Seriously, this is either stupidity or mockery.

Unique stuff:

-All new characters (duh!)
-All new concept of 1-upping Nintendos concept of stage design. A stage inspired by one franchise? Bah, we have stages inspired by TWO franchises!
-They were showing off a game mode with new rules: no ring outs, filling up meter to K.O. your enemies with super attacks. So every character has pretty much 3 attacks to beat an enemy, everything else is meter dancing.
-There will be more game modes and custom options. I would not be surprised if there will be either a mode that is really similar to how smash plays or options that are conveniently placed to customize the game in a more smash bros like direction.

The problem isn't that it is an imitation. The problem is that the denial of imitation.

The Devs admit freely they were inspired by smash brothers, what more do you want from them, a public hanging?

Good luck to Sony I hope the game goes well. Also if Sony 1 ups Nintendo and PSASBR turns out better then SSB then Nintendo will have to up their game and try to win the crown back giving SSB fans a better game so I dont see what the problem is.

I didn't say the devs were the problem.

Its a Shameless rip off. Dont get me wrong, most companies take "inspiration" from other titles. Resident Evil/Silent Hill ( although both games have become unique and different in their own way) and even resident evil was a rip of of games that came before it, but the difference is, they at least tried to change the formula and bring something new.

All Stars is a shameless rip off, no doubt about it, and i dont understand why nintendo havent done anything about it.

But i suppose its not the first time Sony have ripped Nintendo off. Playstation move anyone?

http://www.roms4droid.com/forum/viewtopic.php?f=20&t=422  Link to some blatent rip offs. they are all at it :)

Its a ripoff the same way CoD and BF is a ripoff from the first shooter: wolfenstein.

Dont matter though, since All Stars plays so much better than Brawl in the beta.

Im a Nintendo fan and PSABR offends me. Yes. Videogames offend me.

I personally love fighting games but don't enjoy the SSBB style fighting format. Something about it just doesn't suit me.

What I don't get is why Sony went for an SSBB style which is unique to Nintendo's platform. If they wanted to make a fighter they could have gone for traditional 2D, 3D or come up with something unique of their own. But no, they went for Nintendo's style trying to ride off their success. That is why I say it's a rip-off.