Regarding the recent announcements, it's a mixed-leaning-negative bag for me.
On one hand, I'm not opposed to the idea of a multiverse Sinister Six. In the right hands, I think that could be pretty neat.
Thing is, this isn't in the hands of the amazing team who gave us Into the Spider-Verse. It's the MCU who can certainly pull out some hits, but there's no guarantee they'll be able to make this work.
On top of that, I'll admit something I really don't like is the fact that we've been -getting- these announcements. When J.K. Simmons returned as J.J.J. in Far From Home, it was a legit surprise and I loved that! But with all these returning actors/characters getting announced, I feel it's a major missed opportunity to pull off a chain of surprises. At least wait until the trailer or second one to surprise everyone.
An with the announcements, it's easy seeing what kind of direction they're taking, and it's gonna' get compared and judged by pretty quick since let's face it, Into the Spider-Verse is -the- Gold Standard for this type of direction.