I remember when it came out. I played both the Pro and the LE and I didn't think either of them were neat. I will grant you, I'm not a WWE fan. But I tend to overlook that when evaluating a new game. Just playwise, it didn't capture me.
I don't think too many of these were made. It wasn't a big seller, the theme wouldn't drive sales. However, it was the perfect game at the time because it was the very first SPIKE game released. As a company changes platforms, it is usually cheaper that the first main product based on the platform sells less. That gives them a better field test and makes it cheaper to fix problems due to less units out there.