Nintendo has officially announced a Pokémon Direct coming on 6th June at 3PM GMT which is 8:30PM IST. The official announcement is as follows.
Current Speculation is that Nintendo is going to announce Pokémon Stars that is a sequel to Pokémon Sun and Moon for the Switch and 3DS. Fans are also speculating that they might announce remakes for Pokémon Diamond and Pearl.
Here is the direct link for Pokémon Direct.