Mighty No 9 has never exactly hidden its Mega Man influences. It's from the original creator of Mega Man, features an almost identical plot and protagonist to Mega Man, and replicates many of the same mechanics as Mega Man. Even so, seeing it in action always puts into stark relief just how Mega Man this thing really is.
A lengthy bit of work-in-progress gameplay footage shows the stages and a brief glimpse of the boss battles against Mighty No 2 and 5--based on water and heavy artillery, respectively. The footage is a leap ahead of earlier this year off-screen. While it still isn't quite matching the concept art (above), it does appear to be getting closer all the time. It's due next spring.