Don't know about you, but I absolutely loved both of Mega Man games released on PSP, Mega Man Maverick Hunter X and Mega Man Powered Up.
Turns out Capcom is conducting a poll on its Mega Man 20th Anniversary site, inquiring which system you'd like to see the new Mega Man on. So, if you'd like to possibly see a new Mega Man game for PSP (like Mega Man Powered Up 2), head on over to Capcom's official site and vote for PSP! If you can't read Japanese, just look at the image above and select the box outlined in red.
Rock(man) the vote: make Mega Man go PSP [PSP Fanboy]
Not that I have anything against DS, but they already have 2 MM series on it; PSP needs more! (I think 360 needs one too, but do you think it's going to win in a vote in Japan? I think not.)
Around 700 votes away from the DS.