Today is Mega Man Legends 3 news day. Earlier in the day, Capcom released screenshots of the game, along with an announcement of Mega Man Legends 3 Prototype Version, which will be a preview version of the game launching with the 3DS eShop in May.
Now, we have some lengthy (albeit low-res) in-game footage of the Prototype Version, thanks to a NicoNico stream that was recorded and eventually made its way to YouTube. Part 1 (above) gives you a good look at Barrett, while part 2 (below) has him hop on to a hoverbike with Aero. Part 3 is a boss fight.