Less than 2 weeks from release (depending on your system of choice), Mega Man 9 is already looking at a DLC update!  Although there is no pricing confirmed (possibly free?), you can expect 2 challenging new game modes:

Endless Attack – Test your skills on a stage without end. Try to break the record for getting the farthest. Results will be displayed in the Rankings page. Not compatible with other Challenges.

Proto Man Mode - Play the game as Proto Man. Some of Proto Man’s abilities may differ from Mega Man’s. Proto Man has the Charge Shot ability, Power Slide ability, and a shield that he can utilize to deflect bullets at enemies. However, Proto Man also takes double damage and has double bounce back when he is hit.

There is no story for Proto Man and he is not compatible with Rankings or Challenges.  Look for the new content to hit the Wii today, Xbox 360 tomorrow, and the PS3 on Wednesday.