tails.kicks-ass.net ;) But, first you need an account and CDisplay to read them. Don't worry! They're free!
youtube
sonic comic is the main storyline, and universe is just a spin off continuation of it. If you are looking for which one to read, read sonic comic first, then when you reach around comic...190? I believe? Anyway, then read universe. They are practically the same thing, just under different titles.
in www. sonic .com
you can read them free online with no downloading on youtube.com
On YouTube of couse
You can read Sonic online comics on platforms like ComiXology, Sonic's official website, or digital comic book services such as Amazon Kindle or Google Play Books. Some libraries may also offer online access to Sonic comics through services like Hoopla or OverDrive.
You can read Sonic the Hedgehog comics online on platforms like Comixology or the IDW Publishing website. You can also find physical copies in comic book stores, bookstores, or online retailers like Amazon.
No there will be no show for Sonic Universe. I would like for there to be, but as I read a report "Where Sonic the Hedgehog Went Wrong" in ign.com IGN insider Michael Thomsen (in these exact words) goes so far to decree the whole franchise a sham from the beginning, saying "Our fondness for Sonic is a generational illusion." This proves that after he criticized Sonic's games, Sonic decreased the number of fans and only has Sonic X as a show on TV.
Sonic Universe is not a show, it is a comic series and it is already out.
You cannot read it online for free legally.
I'm not sure where you can read every single one, but I've read several on YouTube. ~Raven
Yes, Blaze the Cat is in the Sonic comics. She has been in the Sonic the Hedgehog comic issues 160 and 161, the first Sonic Universe comic, and issues 21 to 24 of Sonic Universe.