It's definitely an ego thing. There's absolutely no reason for the earliest version of Triple H to be in the game.
As for why 2000 Triple H isn't in, it's probably because 2000 Triple H is way too similar to the current Triple H. The three Triple H's are legit three different characters.
Oh, I wasn't disputing that it was an ego thing, it clearly is. I agree about the blueblood Triple H, that being in is crazy.
You're right, his 2000 character is pretty similar to the current one. Still, though, why would you put Stephanie in the game and NOT have 2000 Triple H?