Brewology

I need your help, my game is coming along great! (the megaman game) with really cool new features, new boss stage and hp and a lot more, but I need your help.
The thing that is needed is I need you to help me get some ideas.
I need ideas for new Playable Charactors, the charactors I have right now are incredible, but needs a change.
So heres what I need from you:
What other playable charactors (maximum up to 2) should I include? Or you know what, the charactor can even be an enemy! Or a boss! (just from megaman)
What kinds of bosses? (maximum up to 4, and tell me which megaman game it was from)
What kinds of enemies? (as many as you want)
What kind of music should I add/change?
What kinds of backgrounds should I change? (mainly for the title screen and stage select screens)
What kinds of weapons would you like?

A second playable character should be either Protoman and Bass

Some bosses, Electric man,Tamahawk man,Clone Mega,Dr. Wily

some good weapons would be Electric wave(megaman 1),Throw Tamahawk (Megaman 4 I think),Triple shot,and Power Punch(Megaman 6)

Well his real name is Elecman but close enough lol. The Clone of Megaman is gnona take too much work sorry, the Elecman should be no prob, and neither should the Tamahawk man, and Dr Wily was all ready planned lol.
Thanks man.