Japanese website New-Quiter posted these news tidbits regarding Biohazard Umbrella Chronicles. You can read the translation below.

• The Biohazard title on Nintendo's Wii is not a side story. It will be part of the main stream series.

• Story follows Code: Veronica (CV -> Umbrella Chronicles -> BH4 -> BH5)

• Three main characters will be playable.

• Jill is confirmed, the remaining two are unknown.

• Rumors suggest Wesker is one of the two remaining unconfirmed characters.

• The games engine will follow Biohazard 4.

Source: New-Quiter, NeoGAF