You can start by “liking” this ( http://www.facebook.com/pages/100000-Strong-for-Bringing-Back-Mega-Man-Legends-3/149316248475958 ).
I’m not one to sign online petitions normally. But this one has been getting thousands of
"likes" within hours. Maybe if this game gets resurected then the next step would be to put a form of Rockman into UMVC3.
We need to keep reminding Capcom how much we love him.