Comingupnext vs Next - What's the difference?

comingupnext | next |

As an adjective next is

following in a sequence.

As a determiner next is

the one immediately following the current or most recent one.

As an adverb next is

in a time, place or sequence closest or following.

As a preposition next is

on the side of; next to.

As a noun next is

the one that follows after this one.