While cutting up Evil Ash, the Necronomicon Ex-Mortis talks to Ash for the first time. It's possible that this is a reference to the Army of Darkness comic series, where the book frequently talks to Ash.
This is the third time that Ash's love interest has turned into a Deadite to try and kill him. The first being Linda, the second Sheila, and now Amanda.
At 19:13, the empty rocking chair rocking by itself is a running sight in the franchise.
The Necronomicon asks Ash if he thinks will be president. In Season 2 of 'Fargo', Bruce Campbell played Ronald Reagan who was elected President and there was a comic series in 2008 titled 'Army of Darkness: Ash Saves Obama', where Ash encounters president Barack Obama at a comic con.
When Deadite Amanda is strangling Pablo in the woods, Lucy Lawless (as Ruby) does the signature Xena whistle from the trees to get Amanda's attention, just as she did in Xena: Warrior Princess.