Question: are season 1 and 2 of slasher related

Answer: No, Slasher employs a season-long anthology format, with an overarching mystery storyline that will be resolved upon the season's conclusion. Aaron Martin, the series' creator/producer, acknowledged gaining inspiration for the format from American Horror Story, stating that, should Slasher have subsequent seasons, the AHS style of self-contained storylines would be used along with, ideally, the reliance on as many actors from previous seasons as possible to portray brand new roles.