If you're asking me why those particular actresses were replaced, I'm afraid I have no answer to give you. I haven't yet found out any information on why this happened.
If you're asking why actors are replaced in general, there are about a thousand reasons. Actors can be replaced if they demand more money, become unavailable due to other projects, have personality conflicts, or if the producers feel someone else fits better.
But I think that I found plothole in The Incredible Hulk. In episode "Innocent Blood" Ghost Rider gives Glenn Talbot a Penance Stare that supposedly changes him for better. But in episodes "Darkness and Light" Talbot is still willing to destroy Hulk and even almost kills Bruce when he and Hulk have Nutrient Bath (which makes him very despicable character).
Not necessarily. The Penance Stare made Talbot feel all the pain he had caused up to that point, but that doesn't necessarily make him a better person. The comics state that the Stare doesn't work on those who hurt the guilty, like Punisher. If Talbot truly felt Bruce was guilty and/or a danger to others then attacking him would be abiding by a certain code of ethics by doing his military duty. It also doesn't work on the psychotic, like Cletus Kasady. If Talbot had some mental instability he wouldn't care about pain to himself or others. It's also possible the Stare wears off and that by the time of "Darkness and Light" it has passed out of his system.
But at the beginning of the episode "Enter the Punisher" there is presumably a goof. Namely, when Aunt May walks upstairs, she goes rather unnaturally, as if her body was digitally moved upwards. I added this to goofs but I may be wrong.
I refined the point. It's not necessarily an error, but a poor combination of computer and traditional animation. It was a bold attempt but not one they were able to pull off with the given technology.
Yes to Disk Wars, no to Mission Marvel. Basically, the animation has to be by Marvel, for Marvel, and of Marvel. In order to keep the focus on Marvel's animation the line had to be drawn somewhere. Outside of that episode, Phineas and Ferb has nothing to do with Marvel, plus it premiered before Disney even bought Marvel.
I'm sorry if I ever gave you any kind of trouble. But I must admit something. I am not American and English is not my native language. I am European. That's why I was unwilling to fix recurring mistakes. Maybe you're right that I shouldn't create pages about actors. Sorry for annoying you with such amount of messages.
Hey! After I corrected your correction to my correction just now, I went poring through some ancient back-issues to make sure I wasn't crazy, and, of course, I'm finding it both ways. I think Claremont always intended it with an S, what with his anglophilia, but it looks like it's both! Sorry about that.
"The original spelling of the character's name was "Elizabeth", though relettering of the UK versions for American reprints would occasionally misspell it as "Elisabeth". This led to spelling inconsistencies throughout future publications. The inconsistency was resolved by Claremont 32 years later in 2008 in the series New Exiles, which reasserted the particular spelling of her name as "Elizabeth"."