For me it’s seeing in Dr Strange an Avengers team From an alternate universe with this cast.
Tom Cruise as Tony Stark/IronMan, John Krasinsky as Steve Rogers/Captain America, Liam Hemsworth as Thor, Emily Blunt as Black Widow and Edward Norton as Bruce Banner/ Hulk.
Fun cast.. but if they had Norton it'd mean Hulk 2008 was set in an alternate universe and Ruffalo is obviously playing the same version as with Terence Howard/Don Cheadel (plus Marvel basically fired Norton for being a pain to work with)...more likely they'd bring back Bana
It looks like what they'll be doing, actors who were considered and didn't get cast either through scheduling (Blunt) or dropping out (Cruise) or just missing out (Krasinsky) along with previous versions (Maguire, Garfield, Bana etc..maybe even bring back some supporting cast Willem Dafoe, Jennifer Connelly, Topher Grace..and they already are bringing back Foxx for SM3) and of course they'll probably want to bring in some big name XMen from the Fo'x'verse (Jackman, Stewart, McKellan)
Yeees the SpiderVerse sounds crazy good. We all want the three SpiderMan together. Actually some people on YouTube saying that Tom Cruise could be the Tony Stark in Toby McGuire’s universe.
Now another crazy rumor is the appearance of Captain Hydra.