The Fujifilm X-H2 has rumored for a long time. Since Fujifilm X-T4 will be officially announced soon, so next high-end X-mount mirrorless camera will probably be Fujifilm X-H2. But Fujifilm X-H2 will not coming soon until in 2021.
Recently, a new Sony IMX671AQR APS-C sensor has leaked online, this sensor has 43MP, can record 8K video. Will upcoming X-H2 to use this sensor ? Stay tuned.