For the record, I am not saying Goku has a chance. There's a very big hurdle in the way called "licensing" that Sakurai has expressed as having much difficulty in crossing to not be worth the hassle in most cases (exceptions being Pokémon and the guests we have). Someone like Goku would be a nightmare in that department.
But let's pretend that hurdle isn't there for just one moment.
The likes of Goku and Shrek, infamous memes in regards to Smash, can just be included magically at the snap of a finger.
Only Goku between the two of them would be given serious consideration for numerous reasons I shouldn't have to explain.
Hence why I said Goku is logical compared to Shrek.
Logical, yet still no hope for Smash.
Just like solo Popo.
But seeing as some people want to twist my words, I'll use a "better example" of a "bigger mind****" they can't say anything about not being logical.
Young Link.