adjective / noun
incoming
IN-kum-ing/ˈɪnkʌmɪŋ/
Approaching from outside to enter a place or role.
The incoming director receives the office keys from the departing director.

Etymology
“Coming in” was used of entering as an occupant. For an incoming officeholder, the place being entered is a position of authority rather than simply a physical space.
In context
the novelty of an incoming true or false tweet,
It is designed to give long-range warning of incoming aerial threats.
More examples
- The incoming president meets with the current board.
- The incoming tide slowly covers the beach.
- A shout of "incoming" sends the soldiers scrambling for cover.
Forms
incoming
Similar words
- arriving
- Emphasizes reaching a destination, not necessarily entering or taking office.
- inbound
- Describes movement toward a destination, not taking over a role.