Adrian Clarke looks at key tactical points ahead of Matchweek 14.
Injury forced Hernandez to miss seven of the Canaries' opening eight Premier League fixtures of the season as Daniel Farke's side struggled to adjust to the top-flight.
But the wide man has been a breath of fresh air since returning to the fold, displaying some dazzling footwork down the flanks.
Bristling with a desire to impress, Hernandez will need to be shackled closely by an out-of-sorts Gunners defence at Carrow Road.
One thing is certain. Whichever full-back is selected will face a player willing to run at them every time he gets the ball.
In his last home appearance, during a 2-0 defeat to Watford, left winger Hernandez was relentless in his determination to take the ball past defenders.
Completing seven of 13 attempted dribbles, the Cuba international posed a constant threat.
Over half of his 54 touches were inside the final 18 yards of the pitch, so it will be essential for Arsenal's defenders to stay on their feet and avoid making rash tackles.
Buoyed by that resilient display, Farke is set to try and repeat the trick against the Gunners, with a focus on exploiting gaps on the break.
In that respect Hernandez will be a tremendous asset.
He scored from a turnover breakaway against Manchester United in late October.
And last weekend he made a devastating surge on the counter, powering through the middle to test Jordan Pickford in a 1v1.
|Onel Hernandez||Per 90||Norwich rank|
|Touches in opp. box||7.06||1|
|Open play crosses||3.4||1|
|Passes in opp. box||3.4||2|
* Min 2 starts
Hernandez likes to stay wide to torment full-backs, but will occasionally make telling direct central runs.
Arsenal, who followed last weekend's 2-2 home draw with Southampton with a 2-1 UEFA Europa League defeat by Frankfurt on Thursday night and promptly relieved Emery of his duties, must ensure they combat this threat.
Confidence is such a vital ingredient to the way Norwich play their football under head coach Farke.
Urged to pass the ball out from the back and to receive it in tight areas all over the pitch, they function best when everyone is feeling on top of their game.
A sequence of poor results appeared to damage that belief.
Until last weekend, the Canaries' players were taking extra touches, rushing their decision-making and showing for the ball less often.
The impressive victory at Goodison Park could mark a turnaround for a side that has seemed to be benefit greatly from the return of Hernandez and Zimmermann.
If Norwich can perform with as much zest and assurance as they did on Merseyside, they could give Gunners interim head coach Freddie Ljungberg a baptism of fire.