You realize most of the succeful MCU movies were composed of B/C list characters right? Iron Man, Thor, Cap, Black Panther, Guardians, etc...
Sorry but no this is a horrible idea. No studio studio should be doing this, it's just more Hollwood Accounting crap. Any reports you read recently about WB shelving a movie because they feared it was so horrible it would damage their brand is a lie. At the end of the day it was about money, not whether the movie was good or bad.
Some were and right now Marvel is in a much more precarious situation box office wise. I personally always saw The Avengers as A List, perhaps not on the big screen prior but without a doubt in comic books.
Since certain films came out they became A list (Guardians, Panther). What other Marvel superheroes are there that you would consider B list that can easily become A list?
The films released to theaters should be more or less guaranteed to do well and strike a chord with audiences - at least until the MCU pulls itself back up - ex: Fantastic Four and X-Men if done right. Get the masses back. Once that is done, experimenting with certain B list can return.
The IP that has a strong chance, but not as solid of a foundation should go to streaming for now. Do heroes that are more well known. Blade for instance, while many here have said it’s risky for film now - it’d probably perform much better than most recent shows on Disney Plus have been.
Then with experimental shows - give them at least solid supporting casts so they stand more of a chance; imagine how Ms. Marvel would have performed if there was at least one known actor in it audiences knew of and liked (Moon Knight was largely unknown too, but it got boosted due to Oscar and Ethan).
Thunderbolts composed of mostly characters from Disney Plus content (including films that premiered there) - should be on Disney Plus. If The Marvels are anything to go by, it won’t do well on theater screens whereas it stands a much better chance on Disney+. I know I’m not alone in seeing that as theatrically risky.
I’m new so you wouldn’t know this - I’ve been vehemently against every tax move WB made. That said, that’s an overall studio - here it’s a brand that is heavily struggling with optics and each flop to disappointment is only going to knock it down more. So while I agree in hating the idea, if it’s either lower the brand more by releasing a film that seems like it doesn’t work or starting over (despite that being financially taxing in the short term) it’s definitely the second as to not further hurt audience trust in the brand (which is harder to win back).