successor TV program; follow-on program
Refers to the next program in a broadcast schedule, especially the one that replaces a previous program in the same time slot.
The successor program in this time slot will start next month.
The ratings of the follow-on program after a popular drama attract attention.
Compound of 後 (あと, 'after') and 番組 (ばんぐみ, 'program'). The reading あとばんぐみ follows standard rendaku voicing of the second element.