At first I was a bit disappointed and surprised that this is going to be released on the DS but recently I've played Contra 4 and it being on the DS doesn't hold the game back at all. I rather like how there are now two screens of non stop action rather than just one. If Metal Slug 7 can pull it off as well as Contra 4 did then I think we'll have a great classic action game to play on the go.
Of course this doesn't mean that I wouldn't rather have a Metal Slug in HD for PSN and XBLA.
And concerning Metal Slug Advance. It sucks. I was excited about it before it came out and had it preordered far in advance of it's release but when I finally got it I got rid of it like a week later. Metal Slug 2nd Mission is a far better game.
Also, I'm gonna guess that this game will actually be pretty decent to very good and yet DokiMajo 2 will still outsell it.