Simplify the following text for a Grade 14 native English-speaking person.
Original: With the recent success of Lock Up and Tango and Cash , at the start of the 1990s Stallone starred in the fifth installment of the Rocky series Rocky V which was considered a box office disappointment and was also disliked by fans because it seemed like an unnecessary movie to the series .
Simplified: With the then recent success of Lock Up and Tango and Cash , at the start of the 1990s Stallone starred in the fifth installment of the Rocky franchise Rocky V which was considered a box office disappointment and was also disliked by fans as an unworthy entry in the series .