It must...it absolutely MUST tell the story how the Megaman story transitions to X (on account of the whole X = 10 thing). Inafune won't have a better chance to end the original series than this for two reasons.

The first is Capcom is notoriously prone to milking a good thing to dry, smelly carcass (i.e. Megaman 30) and I for one want the Blue Bomber to end it on a good note. The second is MM fans (including myself) been dying know the story behind the cryptic creation of X. Yeah, the tons of fanbase theories beaten this blue horse to death but it'd be nice to have an official story (not bits and pieces) to complete the series.