Sony Japan has confirmed in a Press Release that PSOne Classics will be coming to the PS Vita in Firmware v1.80. The firmware update will be released at some point this summer, but a exact release date was not revealed. The PS Vita is currently on Firmware v1.69, so it’s expected that firmware v1.70 will be skipped in favour of v1.80.
In the press release, Sony said:
“You can enjoy the games that were released in the past on the PC Engine and PlayStation, in version 1.80 on PS Vita”
Sony originally announced that PSOne support would be coming to the PS Vita at E3 in early June, and the firmware update was rumoured to arrive before the End of June. Hopefully, the firmware update will be released sometime this month instead.