3 new Sonic backpacks have appeared online.

The first is called the "All-Over Character Backpack".
True to its name, the entire fabric for the whole thing has just 1 pattern which is solid, overlapping classic Sonic. There's no space between them/no background. It uses both actual classic art and there are some neoclassic poses in there too. (Do note the black parts are the bottoms of his shoes, it's not covered in stray zipper-pulls or anything) It has the traditional outer pocket & carry handle with the usual backpack straps.
For whatever reason, this is expensive, though. It is a 2020/2021 item but somehow it is 41 dollars which is roughly double the price of normal single (not multi-item/bonus) backpacks. Why is it more money?

Then there is the "Pixel Retro Backpack"
It's another with an all-over design. In this case, it is black with only a Sonic 1 theme. It uses 16 bit style sprites for everything. It has a scattering of various poses for Sonic (including the unfortunate 'die') , Eggman in his egg-o-matic, and running-eggman, rings and Crabmeat badnick. It has the usual smaller outer pocket, top carry handle and backpack straps. However, it too, is somewhat unusually expensive at 37 dollars.
It is a 2020/2021 item but somehow is roughly double the price of normal single (not multi-item/bonus) backpacks. Why is it more money?

Lastly a mysterious "Pastel Backpack". This is the 3rd backpack in presumably...the line by whatever company made the above 2. The above 2 are likely on Amazon, but all 3 showed up on a Japanese site but there were listed as 'unreleased'. This third one has a bit of a pastel/washed out colors theme. There's pink and pale blue texture in the background of the allover print. It has scattered art of classic Sonic, but spaced apart/not overlapping. It has looking out, ready to run, finger waving and standing arts for him. The zippers, interior and top handle are all black. It is likely that this bag is costly for whatever reason like the others are.