Thought: I think that being certain that Western characters will be in Smash one day is not a good idea. Personally, I like to think that Sakurai keeps adding Japanese game series because most of the Western game industry hogs the attention away those kinds of games from the mainstream. It is kinda like an underdog thing, where Sakurai is motivated to give Japanese franchises the attention they deserve through Smash Bros, of which Smash is probably one of the few major Nintendo franchises that would be able to give Japanese series special mainstream attention.
What kind of attention are they hogging. Usually Western developers are hated as they are either money grabbers or indies that don’t know when to stop talking. If anything, Japan is the one given all the good press outside of a few western devs.
If this was an underdog thing, then why not open the flood gates to the good western devs that get overlooked in all territories. Just because COD is beaten into the ground and full of poor business practices, doesn’t mean that Doom 2016 should be labeled as bad. Sakurai should throw a bone to the diamonds in the rough if he deems them worthy.
Also in many cases, Sakurai seems to love western titles. Dead Space was a big game he enjoyed, Doom’s creator is one that he sees as influential, he loves the Minecraft’s creativity, and he is a huge fan of Fall Out believe it or not.
I see Smash as a coming together of gaming, not a region specific thing. I think the west has done plenty to earn spots on the roster with titles like Skyrim, Doom, Fall Out, Wolfenstein, Minecraft, the Rabbids, Halo, Mortal Kombat, etc.. Why not bring everyone together?
Getting a western playable character would be more difficult than getting one in back in Nintendo's homeland of Japan. Because of the whole language barrier thing.
While there are Western characters like Shovel Knight as an Assist Trophy, negotiating for rights to use a 3rd party character as a spirit, trophy, cameo etc is far easier than a playable character(they also need to pay for music, DLC spirits, and the stage as well for that).
So there's still a chance that there won't be any western characters in the Fighter's Pass.
I feel like this is more dependent on the size of a company. I’m sure Microsoft would be easy as it is a global company that most likely has a Japanese division to sort out some negotiations. Nintendo is also no stranger to working with Western devs now and the company has significantly streamlined the Japan and Western divisions which should make things easier.
If we were to get a western character, now is the time as Nintendo clearly holds good relations with Bethesda, Ubisoft, and Microsoft regardless of the overseas barrier. If they are working with them now, that tells me that Nintendo has put more emphasis on the west than ever before, so this should make things easier.
I don't think the reason why we don't have Western characters is because of issues negotiating. I think, quite frankly, that it's simply because Sakurai and his team are more inclined towards characters and franchises they are familiar with, which would mostly be Japanese franchises. Now, Sakurai has played thousands of games and even goes out of his way to play games he doesn't think he'll like, so he's likely familiar with all the western characters we want in smash. But, like he said in the article I linked earlier, there's a disparity in what Japanese gamers want and what Western gamers want. Naturally, Japanese games are going to appeal more to Sakurai and his team and they're going to pick them more.
He plays western games guys....
He spoke at length about MC and has streamed Fall Out, I doubt he hasn’t put in a character because he’s not familiar with western series.