Yes, yes you'll be able to pitch your ideas for the sequel and yes people will tell you how terrible they are.
This thread has another purpose at least for the start though.
While scouring twitter and the like for new art obviously Spider-man Far From Home came up often in any tag with spider-man in it. It seems quite a few people are excited at the prospect of a live action version of Spider-verse or the inclusion of spiders featured from ITSV (possibly even the actual characters themselves) with all the discussion in the trailer about the multi-verse. It means ITSV could technically become canon to the MCU.
It would come with it's advantages sure, like the team being able to utilize other supers and villains that aren't directly spider-related to help flesh out the universes a bit more. I also see the disadvantage of having Feige gain limited control of what can and cannot be included in the subsequent films because it would clash with his plans for the MCU.
Personally I think a vague reference on either side would be enough. Maybe a voice role for Tom, Garfield, and Tobey in ISTV 2 where they have similar backgrounds to their Spiders but not the exact same would be enough.
Yes, everyone knows Mysterio is full of shit about his background and the multiverse, the mystery is how full of shit he is