Tarantula is being directed by Oley Sassone. That name probably isn't familiar at all, but I'm betting the name Roger Corman is. Sassone has worked frequently with the "King of the B-Movies", having directed Bloodfist 3(starring Don "The Dragon" Wilson!) and the legendarily awful, ill-fated Fantastic Four film which thankfully never saw the inside of a movie theater.
So...yeah. Tarantula is clearly a micro-budgeted flick, and while I'm sure Trejo will bring his usual machismo to the role, having Sassone behind the camera doesn't instill me with a ton of confidence.