If this were the case, than Golden was right in saying that Decidueye and Lycanroc would be on more even ground. The thing is, I don't think Incineroar would end up being too similar to other characters. If Incineroar was chosen, he'd be made unique. Just a matter of if his grappling potential is fully realized or not.
Plus, even if he did end up playing too much like other characters, I don't think that it would impact his chances as much as it did with Chrom. With the quantity-over-quality mindset behind development, the roster is littered with clones, and even one of the newcomers is seemingly a semi-clone. You think another character somewhat similar to another fighter would get Sakurai to reconsider?
Like I said before, I'm not too sure if this will happen, though it's still a possibility. Hate to present a more pessimistic outlook, but I feel that its something to consider.
Careful, though. Characters aren't "made unique" after they're already chosen, at least not based on how Sakurai has explained it. The Smash devs don't try to force characters in if they don't have an idea of a concept that'd work for them. At least, not as far as we know.
Even the grappler thing is more questionable than it seems at first.
Character archetypes in Smash (and other platform fighters) aren't the exact same as they are in traditional fighting games. Grapplers in something like Street Fighter or Guilty Gear rely on command grabs because standard throws in those games are normally very limited, usually only one or two per character. But Smash gives everyone four throws from the get go, all of which can serve various purposes.
Truth is, we
already have a counterpart to those grapplers in Smash even though only one character has more than one command grab, because their regular throws accomplish what they need already. Luigi's down throw, DK's cargo throw, et al are scary options all on their own, and that shouldn't be overlooked just because they aren't mapped to a button. And yet, it has been. And that also discounts the "half-grapplers" we have whose grab games are important to them but not their defining feature, like Mario, Ness, Captain Falcon, even my Lycanroc concepts dip into the idea.
We even have a newcomer that already gets into the mentality of a classic grappler! Ridley's whole thing is making his opponents fear certain powerful options--including his command grab--and then he exploits that fear to create pressure! But apparently he doesn't count, because reasons.
Instead, it's as if the only thing that'd "count" would be a direct 1:1 translation of exactly how their movesets are handled in traditional fighters. Apparently only literal translations count and not localizations, so to speak? Even if it might not work very well and run the risk of the character's specials being rather one-note? Even though Incineroar isn't even
known for using grabs all that often? It's as if people are trying to cram a character in just to fill a quota, which is
itself another thing Sakurai has said he does not do.
So what might be going on here?