A paywalled report from DigiTimes suggests that new AirPods Pro is likely to be pushed into the 2nd half of 2020, or 2021 with no specific time frame of the year. A preview of the report via MacRumors says:
Apple likely to defer new AirPods Pro launch; Apple is likely to defer the launch of its new AirPods Pro to the second half of 2020 or even 2021, according to sources at related suppliers.
Earlier in April Apple leaker Jon Prosser suggested that Apple was in the final stages of confirming a release of “AirPods X” which he says is the AirPods Pro model DigiTimes has reported. He says it’ll have a Beats like design aimed at athletic use.