Why would you request a standalone Mercenaries game? Unless Capcom pump it full of stages, modes and characters from throughout the series and not just stages from 4, 5 and 6, what's the point? I enjoy Mercenaries as part of the main games but it doesn't need a standalone title. And we know Capcom won't put the effort in.
Does anyone see a connection between this and the rumor that a Resident Evil Mercenaries game was coming to the Wii U eShop? I think that's what we're going to finally see some bargain HD upgrade like Revelations with maybe new characters and locations, but it would have to be cheap like thirty MAYBE forty bucks for anybody to want to buy it. This could be what Capcom was saying they're announcing for the Wii U really soon.