'Mission: Impossible - The Final Reckoning' supposedly concludes the franchise. But is it really the end?

Tom Cruise as Ethan Hunt in "Mission: Impossible - The Final Reckoning."

Skydance/Paramount Pictures

• "Mission: Impossible - The Final Reckoning" sees Tom Cruise's hero fight an evil AI known as the Entity.
• The story is packed with intense action sequences and leaves the door open for more installments.
• Is this really Tom Cruise's last movie in the "M:I" franchise?

Warning: Major spoilers ahead for "Mission: Impossible - The Final Reckoning."

"Mission...