It looks nothing like Contra. Really, how hard is to make a side scroll shooter like Contra 4 on the DS? If they had left some indie studio the license they would have certainly reached better results, indies would kill to get an IP such as Contra to work on...
1. Contra 4 is worst the Contra ever; not because it sucks, but because it does absolutely nothing that every other Contra before it didnt already do making it a very been there done that experience. A numbered entry should always mean an official advancement and Contra 4 was a retread.
2. You are essentially asking why cant Contra in 2019 be like Contra from the 80's. Gamers have to stop acting like that every game IP has to be in a box contrained by whatever era it was created in.Think about all your favorite long running franchises; It they were contrained to whatever they were created in what would you not have right?.
I think everybody is being overly harsh based on presentation. It doesn't look spectacular, but it doesn't say anything about its potential of at it least being a good game, not phenomenonal, just good.