Not Bad For An Intro.
First of all for the uninformed, Sentai is Power Rangers before it leaves Japan and comes over to the US. I strongly advise watching some of it before responding to Sentai movies here, so you don't sound like a moron.
That said, I have to say I'm glad someone's attempting to make a Sentai series on NG. Overall, there wasn't really enough going on to give a full review of this (since it's just the intro), but it looks decent so far. I'd just say tighten up the graphics and try to make it run a bit smoother. I can't wait to see what the Henshins and Gattai look like.