Every single one of us was wrong about many things, we may have got a few small things right, but ultimately the speculation meant nothing.
We have to face the facts, cuts happened, more will happen. This isn't Super Smash Bros, this is Super Marketing Bros.
Pikachu, Charizard, Lucario, and Greninja are all very marketable for Game Freak, the only possible choice left is Mewtwo, Jiggs has overstayed her welcome. The people who keep saying "she can't, she's an original!" are in denial now, there have been many times when we said that there was no way something could happen but it did. Remember when Ness was almost cut for Lucas? Ness is an original. Jiggs almost didn't make it into Brawl either, are people forgetting these things?
If we can lose the main protagonist of Pokemon, we can lose an old original that is no longer important to Game Freak. I could be wrong yeah, but this is honestly the most likely thing to happen, and if you really want to say otherwise, look no further than Greninja. You can stay optimistic, but I'm not keeping my hopes up.