I know folks may not care for iron spider. But logically with how big stark and iron ma is for mcu. It's more likely be iron spider seen before any other future armored suits. Judt going by how marvel is.
I honestly don't see any viable way around it...once the team come together, all past issues are put aside, whatever relationship Tony has with the young upstart, that remind himself of, will eventually realize that Peter will need some shielding/armor protection....and if the rumors are true, that Tony has some involvement with Spidey's costume; it's not out of reach, Tony, would have thoughts of providing the Iron Spidey suit, to not only aid it the battle(on Earth & Space) with Thanos & Co....but much like the comics, get Intel on Spidey's vitals, on what makes him tick....you know what I mean?
Alien costume saga is the whole second movie with Eddie Brock and Felicia Hardy introduced as characters. At the end of the film Spidey gets rid of the suit via the bell tower, and Felicia helps him get away. The after credit scene is Brock, all depressed at losing his job, comes into the church after hearing all the ruckus, the symbiote latches onto him. The last thing we see are the large eyes and toothy smile before the film cuts out.
Last movie is all about Spidey trying to survive Venom while Venom tries to rid him from the world in some misplaced attempt to be a hero. Venom is such a huge villain that people love. You just need the right person at the helm and no excessively terrible producer mandates.
I don't think the "Alien Saga" is the best approach given the direction we think MCU is heading. Not saying some element shouldn't be included...just reference bit of it into a film. However, I would take a more original approach, with including it not only to the Spidey verse but MCU, as many have suggested, with IW.
With that said, I don't see a 2nd Spidey film happening in between IW 1&2, unless he's not in the first...which none of us, at this point, believe that to be certain. Just don't see any character solo film being sandwich in between IW's unless they are not introduced in the 1st. Makes no sense to be in Part 1, go do a solo, with a different situation to deal with, then rejoin the crew for Part 2.
Why I have hi hopes they start right off building towards the Six in the first two films, moving forward; but, not necessarily "About" building the Six, if you follow what I'm saying.