Here's a surprise. Famitsu Weekly (via 1UP) is reporting Ninja Gaiden Sigma 2, an upgrade of Ninja Gaiden 2 for the PlayStation 3, is getting a massively cool new game mode: online co-op. The tag-teaming doesn't apply to the game's single-player adventure, but rather, Tecmo's building "team missions" for optional cooperative play.
I wonder if this is a hint at the future of the series. If so, maybe I'd finally finish one of 'em.