Hey Mewtwo fans. I haven't been in this thread for weeks, because for the longest time there just didn't seem like there was anything to talk about. We all knew all the reasons why Mewtwo made sense to come back, and so all there was left to do wait wait.
The first time I saw the real roster leak, I knew it was probably true. I went back and forth a few times, as people tried to find flaws to prove that it was fake, but as more and more of those flaws were shot down I kinda suspected that what we have seen was the real deal. Yes, I did find it bizarre that Doc, Lucina and Dark Pit were together at the bottom, and for a while I latched onto the "4-5 more characters" thing, but right now that is not looking too likely. The original leaker apparently got somebody fired and under lawsuit, and the person who outed his personal information claimed he lied about the "DLC" characters. There were other people who were "leaking" that Mewtwo was among these supposed other 4-5 other characters, but they don't seem to have any credibility.
There is perhaps a slim chance that Mewtwo could still make it into the game, but I do not think we should count on him returning, now. Expect that he will have been left out of Smash 4. Between now and when the official release in Japan takes place we might get a surprise, but if we don't our only hope are the people who will crack open Smash 3DS's code to see if Mewtwo is in there as a secret or DLC of some sort. But, I am not optimistic at all.
I have been ready for the day that Mewtwo would not return for some time now, but honestly, what has made it all the more frustrating now, more than before, is the inclusion of Dark Pit. Doctor Mario is an easy clone to add, and is a veteran, and so he does not bother me at all. Lucina is one of my favorite Awakening characters and was easy to add to the roster, so I harbor her no ill will. But so help me, if Dark Pit gets an original moveset, I will be a bit pissed off at Sakurai if Mewtwo doesn't return. If Dark Pit is just a clone without the bow & arrow, okay. But man... Grr. I don't know. I haven't seen any leaks on what Dark Pit does in battle, so I just don't know. It's just... Sad. I'm sad. I wish Mewtwo was coming back, but it doesn't look like he is.
I hope I'm wrong.
It's been fun, guys. Maybe in Smash 5.
Edit: I will also add that I am not happy that Ice Climbers and Wolf are not coming back, either. Smash 4 has a good roster but I wish there weren't so many cuts. Many of us thought that the only cuts would be Snake, Ivysaur and Squirtle...