It’s not currently planned, and we probably won’t have airborne patches to inhabit. (Ground is maybe a possibility, but it may be a while yet before we can adequately convey them as an environment. Not to mention it provides a trickier path to multicellularity)
Airborne microbes in particular might have a future as a potential migration method, whether by forced relocation via natural events, or deliberate evolution of water crystallization promoting protein structures, but representing a proper ecosystem in the clouds might be a bit out there for the time being.