in the pipeline
US /ɪn ðə ˈpaɪpˌlaɪn/
UK /ɪn ðə ˈpaɪpˌlaɪn/

1.
being planned or in the process of being developed
:
•
We have several new projects in the pipeline.
•
A new software update is in the pipeline for next month.
being planned or in the process of being developed