Metal Slug 7 DS hands-on at IGN.

"Okay, so the original Metal Slug 1 for the Game Boy Advance - announced for release like two years ago - still manages to be a no show, and will probably never exist now that the GBA is on its way out to pasture. No worries, as SNK Playmore is bringing the series to the Nintendo DS. But not the original Metal Slug like the Game Boy Advance version was going to be. No, this one's a full-on sequel: Metal Slug 7. And it was on display at the SNK Playmore booth during the Tokyo Game Show this week."

Full Source: IGN