Bluetooth gamepad support is a make or break thing for me on this. I would not want to play a contra game with touch pad controls.
I hope this project is well made, well tested for playability, because I don't think it looks bad in terms of gameplay - looking very similar to the games in the series I enjoyed.
Sure I'd rather they had larger budget bigger scale titles, but I think this is a step in the right direction to support and keep their IPs alive, and gives me hope for future Konami titles. The gameplay and art quality should not be affected by the platform at this point, a great looking and playing title can be on any platform, so that doesn't scare me about this - the question of gamepad support does concern me though.
I am sure they are making this with tools that easily port it to PS4/XBone/NX/WiiU/3DS, so the fact they are producing this content makes me hopeful for ports to a platform I'd be more likely to play.
Some Contra is better than no Contra, I think..
Bring on the linear Castlevania!