It looks like it has a lot of potential, I haven't caught up on any of the Star Wars movies as is though. I am a huge fan of the Originals, Prequels, & the Extended Universe.
Let’s see: 1. Mandalorian Armor 2. Bounty Hunter 3. Wrist fired grapple/snare wire 4. Bounty Frozen in Carbonite 5. Post RotJ 6. IG-88 (ESB) But he’s a completely new character... riiiiight.
They keep saying it’s a new character which could mean they trying to “subvert expectations” with a surprise that it’s actually him. And if it’s not him, all of the coincidences are simply there to play on the fan following i.e exploiting them. Boba was a clone of Jango Fett pre-clone wars, then raised by Jango Fett who lost his head in Attack of the Clones. Could however be another clone of Jango or Even Boba but that would just be silly.
In the extended universe books Boba did survive the Sarlaac, this was of course before Disney did away with most of the canon from the extended universe. A Barve Like That: The Tale of Boba Fett