You got a great site that promotes Devil May Cry. Surely that deserves few copies of DMC HD and DmC for competitions? If i was working with Capcom with DmC project in any kind of job i would go to Capcom and say "DevilMayCry.org is a great DMC community, and it's
also good for marketing reasons that we sponsor their competitions".
So i honestly don't see it as you pushing your luck, though i may feel otherwise

But try Steve, and if they say no - it's all good. Perhaps they will say "Sure we will provide copies of DMC HD and DmC but on one condition: the competition(s) must promote DMC".
They really would be fools in my eyes if they don't take advantage of such opportonity to sponsor one of the best DMC sites. It's cheap way of advertising the game.