Indeed, the Gunners host City at the Emirates in what is almost a top-of-the-table clash (with Leicester City currently in first).
And Henry is intrigued as to how Arsenal will deal with Manchester City, who have pace in abundance on the break and will likely look to use it in north London.
Henry is quoted as saying by Sky Sports: "I want to see how Arsenal will deal with it, they blew United away at the Emirates so early in the game.
"I thought against Sunderland they were a bit lucky because it could have been a draw. I want to see how Arsenal will stop City on the counter."
It will be a very interesting test indeed for Arsenal on Monday as, like Henry says, they have already proved themselves against Manchester United.
The Gunners are known for crumbling when the going gets really tough but this is the perfect opportunity to beat Manchester City. Arsene Wenger already led his side to victory at the Etihad Stadium last season and this one is at the Emirates.
Of course, the biggest winners could actually be Leicester City. If City and Arsenal draw, for instance, Leicester will have a clear route to extending their lead at the top of the Premier League!