Director Jon Wright managed to do something exciting with a monster movie in 2012’s “Grabbers,” and he returns with another subgenre target, looking to revive the critter cinema with “Unwelcome,” which is being sold to viewers as a kind of “Gremlins”-style feature concerning the unusual activity of small beings and their enigmatic interests in a pair of new homeowners. The screenplay (by Wright and Mark Stay) commits to the creation of a backstory and society for the little menaces, but “Unwelcome” isn’t a free-for-all horror experience I’m sure many expect it to be. It’s much darker, with the writing working to develop a clear understanding of mental health issues before it unleashes knee-high threats, and even that takes some time to arrive. Wright wins points for keeping his picture quite hostile, but a natural slide to screen chaos with fantasy creatures is mostly avoided, making for an accomplished, but slightly confusing film. Read the rest at Blu-ray.com