The problem with Mega Man/Rock Man is it's a borderline dead franchise. All it has going for it right now is perpetual ports of older games and a mobile game that not too many people in the west aware exists.
That being said, I really wish someone did something new with the brand besides the same sea of main characters and side characters. Why does every mm line need to start with mm1 robot masters? I get Cut Man because he's a cheap easy retool. It be nice to have a better mix.
Every X line is usually X, Zero, X1 armor X, and sometimes X1 Vile or Sigma and probably black Zero.