The movie being badly received doesn't matter, where's Sakura's movie? Where's Sakura in MvC3, TvC, Power Rangers and more? Where's Sakura's song done by a mainstream artist?
Here's Sakura's song and it's done by her JAPANESE VOICE ACTRESS.
Plus, I know it's not the intent behind your post, but I could tell just from the way you worded that first paragraph that your reply (in my head) sounds extremely rude.
Are you upset that Smash had Sonic instead of Vector the Crocodile or Cream the Rabbit? Are you upset we got Snake instead of Silent Wolf or Vamp? Are you upset we got Mega Man instead of Guts Tank or Dr. Cossack?
I'm not upset by any of that.
I'm not sure if you're aware of this, but Morrigan's the main character of Darkstalkers. They keep using her because of her status as the main character and thus, the mascot.
Yeah, well, Donovan was the MAIN CHARACTER of Darkstalkers: The Night Warriors. So according to your logic, Donovan should be used more just because of his main character status in one game. Plus, if you still don't believe me, Cutie, at the ending of Morrigan's story in Super Gem Fighter Mini Mix, it literally shows Morrigan complaining that Lilith - which is basically Morrigan with a more cheerful personality and less painful moves - is more popular than she is. I am serious about this.
(You tried it, Morrigan. You tried it.)
My point is that while it is nice to use the main character, you shouldn't use them TOO MUCH. Morrigan is - as you say - the "main character of Darkstalkers" (Yeah, I'm sorry, Donovan came first), and Capcom is using her to no end when they have other characters to represent the Darkstalkers series. Like I said: not only has Morrigan been the Darkstalkers representative in crossover fighting game Capcom has ever made, she's been the Darkstalkers representative in
EVERYTHING. Like SNK proved in
SNK vs. Capcom: SVC Chaos by adding Demitri into the game over Morrigan (and they did it again in
King of Fighters 14 by adding Nakoruru as the Samurai Shodown rep over Haohmaru - and that choice ended up getting them out of bankruptcy), you don't need to use the main character of a series in order for people to recognize it. And that's what I want Nintendo to do with Darkstalkers if it ever comes to Smash. If you don't want that to happen, that's alright: it's just MY opinion. You have no right to be rude over it and make your replies sound rude to me.
I don't know whether you know this or not, but in order for a series or franchise to be recognized, you don't just need to copy and paste your "main character" into every single piece of media you can find. There's all sorts of secondary characters too, and they need some attention in the spotlight as well. Capcom did it with Red Earth, because even though they usually use Tessa for crossovers, in Capcom Fighting Evolution they brought over characters that WEREN'T TESSA (Kenji, Leo, Hauzer, and Hydron). They also did it with Cyberbots as well, as though they usually use Jin Saotome for the crossovers, they also bring in Devilotte as well, and hell: sometimes they even bring in BOTH OF THEM. They even did it with Rival Schools, and they used a LOT of variety when it came to wondering which characters from Rival Schools to put in other fighting games. I just want the same thing to happen with Darkstalkers, as though they bring in some other Darkstalkers characters sometimes, Morrigan just hogs the spotlight from every one of the Darkstalkers who joins her in a crossover (usually Felicia and Hsien-Ko, and sometimes Donovan is thrown in there).
Listen, you can reply to my comment in whatever way you want: just don't make it sound like you're being rude.