Due to University I'll want to keep my simulcast watch pretty short for this season (and gives me room to sort out anime backlog and video games).
Here's my picks:
Haikyu!! Season 3 - Karasuno Koukou VS Shiratorizawa Gakuen Koukou
This match is going to be epic, though it's only 10 episodes but I'm not fussed. I am however concerned that I can easily see how this match is going to end, but let's hope that I am wrong. A lot of sports anime has been rather predictable on its outcomes (Yowamushi Pedal surprised me at the very least).
Keijo!!!!!!!!
You knew this was going to happen. The concept behind this series is daft but rather intriguing. This will be a lot of fun to watch.
March comes like a Lion
Aniplex show of the season. The story, animation and studio has intrigued me and I haven't checked the PVs at all, just need to check the images and I'm already invested.
Sound! Euphonium Season 2
The expressions are strong with this one. I'm curious to see what direction the story goes for this season.
Honorable Mentions + May Be Included In My List During Simulcast:
All Out!
Rugby anime + Madhouse. Then again it could fall flat.
Ajin: Demi-Human Season 2
I marathoned this show when it appeared on Netflix. I may do the same with this season.
Drifters
The concept sounds interesting but I may wait it out in case it's that type of show where marathon the series is the best way to experience it.
The Great Passage (Fune wo Amu)
Amazon Prime Exclusive of the Season. The concept sounds interesting but I'll wait it out for now. I do have access to Amazon Prime now so I'll check it out when I want to.
Lugar Code 1951
The visuals look cool and studio DEEN is animating it. However it could fall flat so I'll wait it out.
My Wife Is The Student Council President!+!
Season 1 was rather entertaining. It's a short series so I'll wait for the whole thing to finish.
Occultic;Nine
Set in a timeline where all of the Science Adventure instalments are fiction, I'm curious to see how this series is handled. I'll wait it out for the time being though.