SFV's failure so far was completely self-inflicted. It would have done great if wasn't rushed out.
It is, I agree, but I'm thinking that the market is just too saturated with high quality one-on-one fighters and Capcom may have mistaken FGC hype and heavy user boredom of SF IV for thinking everyone, including the more important casual market, was ready to support another new mainline installment as well as the previous game so soon. SF IV picked things up for the genre, but this isn't the heyday of fighters or consoles, either. Add the rightfully-deserved negativity of releasing a thinner full-priced product than any previous SF sequel or any of its current rivals and you've got a tough sell even for the mighty SF. Though it was a major get for Sony, Capcom gambled away potential Xbox and Ninty sales by locking the V series up for the generation like Namco did with Soul Calibur 3 on the PS2. Hindsight, I know, but I'm thinking Capcom management chose to accelerate the production of a still-in-progress SF V to make the quarter when they should have stayed the course, not taken the Sony money, released the game in 2017 in better and more complete condition and competitive shape, and put it on everything, including on all three major consoles. That would have done more to ensure success and longevity for the franchise instead of what's going on now, but whatever.
A relatively niche series like Darkstalkers has no chance when the newest SF is going to struggle until they can reintroduce it in better than skeletal shape post-current DLC plan. If Ono is serious about giving DS a shot at new life, they should be porting Resurrection for current platforms to build awareness, but then an arcade legend like Capcom shouldn't be leaving their legacy IP to rot when it's safe to reissue emulations or recent gen ports on digital stores every gen. I mean, we're long past the point where it should be a question about whether there should be a regularly updated virtual arcade platform, like their past-gen Arcade Cabinet or MS'/Krome's Game Room for all of their IPs. Money on the table while there is a slice of users who will pay for classics most emulate for nothing now.