According to Thor Ragnarok star, Tessa Thompson, a fourth Thor installment has already been pitched.
Thor did not get off to the most blockbuster start, but the franchise’s latest effort, Thor Ragnarok, certainly captured the imagination, and delighted fans and critics around the world.

The future of characters like Thor in the Marvel Cinematic Universe beyond Avengers: Endgame isn’t quite clear at the moment. Fans of the Asgardian will be delighted to hear that Thor 4, directed by Taika Waititi, has been pitched. In a recent interview with LA Times, Tessa Thompson said:
“I heard that a pitch has happened for [another Thor film]. Don’t know how real that intel is, but I heard that the pitch has happened. I think the idea is Taika Waititi [who directed ‘Ragnarok‘] would come back.”
If a fourth Thor film does go ahead with Waititi at the helm, it would likely release late 2021 at the earliest.

Source: DenofGeek
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NOICE. I hope they take the pitch and get the ball rolling. Thor is one of my personal favorite MCU heroes. I even enjoyed the first 2 Thor movies. He is a beast. Doctor Strange probably comes second on my list. I would like to see a Doctor Strange 2 come out first though.