4) Helen Mirren
As I mentioned at the start of this post, Marvel has the opportunity here to cast pretty much anyone they like as The Wasp, so if they decide to go down the route of her being roughly the same age as Hank Pym, then Helen Mirren would be absolutely perfect.
The extremely talented British actress brings a lot of gravitas to any role she takes on, and has proven in the past that she’s not one to say no to an action blockbuster (RED may have been terrible, but she certainly stood out as a highlight).
[zergpaid]The interesting thing about casting a Janet of this age is that the character would have lost years of her life stuck in the Quantum Realm, a potentially fascinating plot point to explore in this sequel.
Throw in the fact that Mirren is simply amazing, and this would be very exciting to see.