On the UK website Vue Cinema, the screening tickets now appear to have become available to book for Sonic 2. This is quite early as the movie is a month away still.
Booking screenshot

Sonic the Hedgehog 2 introduces Knuckles and Tails, and sees the return of Doctor Ivo ‘Eggman’ Robotnik.
Sonic 2 Synopsis
The world’s favourite blue hedgehog is back for a next-level adventure in ‘Sonic The Hedgehog 2’. After settling in Green Hills, Sonic is eager to prove he has what it takes to be a true hero. His test comes when Dr. Robotnik returns, this time with a new partner, Knuckles, in search for an emerald that has the power to destroy civilizations. Sonic teams up with his own sidekick, Tails, and together they embark on a globe-trotting journey to find the emerald before it falls into the wrong hands.
From the filmmakers behind The Fast and the Furious and Deadpool, ‘Sonic The Hedgehog 2’ stars James Marsden, Ben Schwartz as the voice of Sonic, Tika Sumpter, Natasha Rothwell, Adam Pally, and Jim Carrey returning, alongside new additions Shemar Moore, with Idris Elba as the voice of Knuckles, and Colleen O’Shaughnessey as the voice of Tails.
Official Trailer
Sonic 2 releases in cinemas on April 1, 2022.
This was spotted and made aware to me thanks to Twitter user @Spiderman3news.