Well, you can call it Megaman Online too if you wanna. But anyway, the game, which is in development by Korean F2P giants Neowiz, has just revealed its very first promotional trailer. While nothing is shown with regards to ingame mechanics or teasers, it briefly describes a possible storyline within the game itself.
It seems that various Rockman versions (like the original, Zero and X) will be gracing the game. It is also rumored that the game will be a 3D side-scroller, much in the veins of Dragonica Online. There is currently no date set for anything, so stay tuned as the teasers are leaked out!