So, you think Nintendo should give up Zelda and Pokémon, two of its most popular and profitable properties, just so we can have a sequel to SMRPG with some of the old Square-owned characters?
And yes, I don't believe any of those games is directly competing with each other. The only thing that creates a rivalry is fans. Perhaps Mario fans bitter that Nintendo is focusing a lot of its time in Pokémon, or Zelda fans claiming that Zelda is Nintendo's greatest RPG and Pokémon is little else.
Jeez, have an open mind. Just because we don't care whether or not Nintendo includes old SMRPG characters in a new game doesn't mean we're Mario traitors. I absolutely adore all three of them and wouldn't want to see Nintendo drop a single one. The only thing Nintendo's wasting their money on are those limited or cancelled ventures such as Earthbound64 and the 64DD. While it would have been cool if they came out, they didn't, and so made no profit and are a waste of cash.
It's business sonny-jim.