So, I found an old quote from my one-time pseudo-colleague, Seth Killian, from when he was still at Capcom USA that explains my viewpoint when I see people say something that is popular in the West would be likely for Super Smash Bros. ignoring if the series is popular, or even out, in Japan. This is what I think every time I see someone think a character from Doom, Skyrim, Mortal Kombat, or Shovel Knight is likely for Smash because they are 'popular' when, in reality, they are primarily or even only popular in the West (note that this was primarily annoying to me during the Ballot when everyone was positive that Shovel Knight was going to be the Ballot winner due to popularity..when his game hadn't even been released in Japan yet, leaving most Japanese to wonder what exactly a 'shovel knight' even was, not so much now unless someone thinks the character is absolutely happening due to popularity)
"Beyond sales however, it’s largely a cultural impression issue. I think most Capcom Japan staff view Mega Man as a fairly "Japanese" character (as opposed to, say, Frank West). I think Americans often assume that because something is popular in America, everyone else probably likes it too. In Japan, it’s usually the opposite — the more "Japanese" something might be, the less they would expect it to be popular elsewhere."
Note: this was in regards to Capcom Japan believing that Mega Man wasn't a popular character in the West.