Will IPUMS eventually include the CPS Unbanked Supplement from 2015?

Census Bureau website indicates there is a 2015 supplement for ubanked, here.

Wondering if and when this might be available via IPUMS.

Yes, the IPUMS CPS team does plan on releasing the 2015 sample of the Unbanked Supplement. Although, I am unable to forecast exactly when this will be released, it should be within the next year or so.