The idea of Kraven and The Lizard (and Kraven burying Spidey alive to get Lizard alone) is good. I was originally against The Lizard as a villain idea, but with Kraven and an appropriate actor could be fantastic. I'd love a cameo though, Shocker as a bank robber or Mysterio doing something with his illusions, but quickly apprehended (with broken fishbowl, showing it to be Bruce Campbell unable to keep a steady job

) or something similar.
And as for Raimi wishing to redeem himself of sorts for Spidey 3, I'd love something like, at the end of 4 having the symbiote appear beside a jail, and it starts forming a body and we hear screams as both Venom (appearing much bigger, built, more demon like, long tongue, striking distorted eyes) and Brock (His face appearing once or twice) forms from it, talking as both the Symbiote and himself (using "we" a lot) and at one point in the reform, the symbiote bulges and cracks and splits and a piece enters a crack the building and latches onto Kletus Kassady, perhaps oozing into a self inflicted wound maybe and forming Carnage. I hope Raimi could make 5 a horro like movie with a serial killing Carnage on the loose getting away with as much as possible in terms of adult themes. (I'd love Robert Knepper in the Kassady role. I can picture it already)
Sorry about the lengthy post. And I understand people being against any resurrections or how the symbiote reforming or saving Brock is out of canon or so, but I'd accept this and would make me excited for a return of the Symbiotes.