I tried getting into this series a few times, the originals, the HD remasters, only played 1/2 I think and got a decent way through 1. I like the concept and the wackiness but I just found the games got boring because there's hardly any level design and it's just waves of tons of enemies at once like a horde mode which I also find boring in general.
There's definitely a place for shooters like this so good for them to keep making them. I'd give it a try again if they shook up the formula and made it closer to something like Doom 2016.
Also I was expecting better graphics from the SS4 trailer. SS3 already had a pretty nice photo-realism look iirc? This doesn't look much different from my memory of that.