Streets of Rage 4 will be getting a physical release in Japan thanks to 3goo, where it will be known as Bare Knuckle 4: Special Edition. This will not be a limited physical release unlike the western release.
In the west Limited Run Games will release limited print physical standard and special editions of the title. Pre-orders from Limited Run Games will be open until a week after the digital release of the game and can be found here.
In addition, we would like to add that there is an active Sega retrogaming Facebook community group you can join at https://www.facebook.com/groups/segaretrogamers/
For more, visit Retro Gamers Hub (www.retrogamershub.com) for their extensive collection of retrogaming interest groups to choose from.