Yup! ASUS is skipping a number on its ROG Phone, from 3 to 5 and it will be unveiled on 10th March 2020.
This is confirmed when ASUS launched a microsite for its but there aren’t any much details of the device. As rumoured, the ASUS ROG Phone 5 will feature a colour LCD on the rear instead of having just RGB for more customization. It will be powered by the latest Qualcomm Snapdragon 888 (could be binded with higher clocked speeds)
Source: ASUS ROG