When Sylveon was made I thought,

"What?! Another eeveelution? *sigh* the seven we had and loved was enough...*

But as you say, now that Sylveon has been made, maybe they will create a badass dragon type! I'm not overly excited over Sylveon but niether am I really upset. With this new theory I'm more,

*Oh well! When God closes a door, he opens a window."

Great theory! Hope it's true! *fingers crossed* ^^