Ok, knowing that there are at least 7 chambers, let's figure out what could be in them.
We know that Doc Ock's arms and Vulture's wings will be in two of them, and it's a pretty darn good guess that the Goblin stuff (glider, armor, etc.) will be in another.
So that's three down...
The Eel tank could be in one. I could see Harry using one of the chambers to enhance Electro's powers. The enery containment suit that Electro wears could be part of this one...
From here it's all about what could be in them, based on the villains we know...
- The black goo (symbiote) is likely.
- Shocker gloves is possible.
- I could actually see a cross-species Rhino chamber. Once the Mech is defeated bringing it back may be redundant, but if Alexei was willing to undergo the process the cross-species thing would be cool.
- Scorpion's suit would make sense, but would be very similar to Rhino as far as being the muscle. I'm starting to winder if Rhino will be back, though didn't Giamati say he would be back in TASM3? If he did then that lends support to the S6 in TASM3, not 4.
- An illusion suit with holographic projection, chemical weapons, etc.
- Chamelian's belt or suit? Unlikely, but possible.
- A Sand melecularizer. Although it's possible, I would be surprised if Webb tried to redo Sandman, especially if Rhino will be there. Rhino effectively becomes the muscle on the team instead of Sandman.
- Spider Slayers
- Jackal Cross-Species. Not likely.
Now it would make sense that villains without equipment wouldn't be represented. This would include:
Kraven, Black Cat, Kingpin, Shriek, Morbius (guess he could be), Carrion and Silverman.
Also those who are very similar to others wouldn't be included. This would include:
Menace, Hobgobin, Doppelganger, Demogoblin and Carnage.
So the most likely list is:
Definitely/Most Likely:
1. Goblin (Glider, Armor, etc.)
2. Doc Ock (Arm harness)
3. Vulture (Wing harness)
Likely to round out the remaining four:
4. Electro's Eel tank
5. Rhino cross-species (different from the Mech - unless Mech Rhino gets away in TASM2)
6. Symbiote Black Goo (Please not part of the Sinister Six!!!)
7. Scorpion Suit
8. Shocker Gloves/Suit
Less likely:
9. Mysterio's suit
10. Jackal cross-species
11. Sandman moleculizer thingee
12. Spider-Slayers
13. Black Cat cross-species
14. Vampire cross-species
15. Chamelion Belt/Suit
Almost impossible:
16. Anything to do with Kingpin
17. Anything to do with Kraven
18. Anything to do with Carrion
19. Anything to do with Shriek
20. Anything to do with Silvermane
Am I missing any likely villain that could be represented?