Will there be a Long-Term Servicing Channel (LTSC) release with this release?
No. Windows 10 Enterprise LTSC 2019 is the current LTSC option, and was released with Windows 10, version 1809 in November 2018. The next LTSC release can be expected toward the end of 2021. Customers currently using Long-Term Servicing Branch (LTSB) 2015 for special-purpose devices should start working to upgrade those devices to Windows 10 Enterprise LTSC 2019, as mainstream support for LTSB 2015 ended on Oct. 13, 2020, and it entered into extended support. See the lifecycle policy here.