*sigh...
Going to be very careful with my speech, since people like to argue over frivolous stuff.
You'd be better off playing ghost battle for the endings. They'll all become unlocked eventually, and you'll get millions more in gold. Personally, I hadn't done it that way, as I'm online more than I play actual ghost battles.
In Tekken games, characters are unlocked over a period of matches. You either meet the condition of completing arcade mode with X character, and get Y character unlocked, or you play (amount) of matches, and get Y character unlocked.
This is probably going to be the case with the endings this time around, as unlockables are DLC, but, I have not played enough survival/other matches to say for sure. But, ghost battle will give you what you want. Arcade mode is a waste of time, unless you're looking specifically to fight Unknown.








