Rifleman

First appearance: Downrange (2017)
A group of teens run afoul of a masked maniac. Unlike normal teen exterminating masked manics, this one doesn't use cutlery or power tools or forestry equipment, he's got a rifle.
Weird variation on a slasher flick. I really liked the ending.

Joseph

First appearance: The Crescent (2017)

A woman and her child move into her mother's house to deal with the grief of losing her husband and to marble paper. Unfortunately for her there's some weird stuff going on around the beach.
A horror flick in the vein of EYES OF FIRE and MESSIAH OF EVIL.

Ernest P. Worrell

First appearance: Dr. Otto and the Riddle of the Gloom Beam (1986) [Yeah, I know Ernest was doing commercials and stuff before this movie but this is his first movie appearance]

Beloved comercial personality Ernest P. Worrell makes a couple brief appearances in the Jim Varney movie Dr. Otto and the Riddle of the Gloom Beam, which is an odd 80s comedy where Varney plays a variety of characters (all disguises of Dr. Otto). Eventually Ernest gets a chance to star in his own movie Ernest Goes to Camp. If you’re going to watch an Ernest movie I’d suggest any of the Touchstone flicks and/or Ernest Rides Again.
Since everyone likes "Goes to Camp" here's the trailer for that:

Mrs. and Mr. Ryan

First appearance: Mom and Dad (2017)

For some reason parents have an uncontrollable urge to kill their offspring. Not ALL kids, just their own. Could it be some kind of attack on the country or the entire species! It doesn't matter, your parents will kill you.

Jötunn shape shifter

First appearance: The Ritual (2017)

Four friends go on a hiking trip to morn the death of one of their other friends. The learn that it's not a good idea to take shortcuts.
Based on a novel by Adam Nevill