People shouldn't hate that another one's coming. Unless people hated Ruby/Sapphire/Emerald, I see no declining pattern. It's most likely they're going to add another 150 pokemon to stay original, at least.
It's also unlikely they'll be using odd names.
They never had colors like purple or orange.
If they continue with gems, I'm sure they'll use something common, if there's anything left.
Hey, who knows? It might even be the end of th gem era. =P