It all comes down to popularity and ease of access and simplicity take marvel for example everyone loves it because anybody can win at it give to a first time player tell them how to pop X-factor and hooray they can mash win against a whole team essentially and as others have said SF4 the way i feel its the simple gateway for beginner FGs it teaches you basic fundimentals and is easy to see and teach because of its slow paced action thats why alot of people flock towards those games because they're easy from the get go and they do have their advanced stuff. but then you show them something like GG or BB or Skullgirls and they get lost so fast because immediatly or their SF and marvel stuff gets thrown out the window and they say it sucks cause its not like street fighter ive gotten this response so many times ive tried to teach but dudes just dont want to put in the time and effort when you can spend half the time to learn a capcom game because they cater towards ease of access more than recent FGs.