Yeah I'd been reading rumors about that too. Her character in the comics became Black Widow I think so narratively, it makes sense. Personally, I love the idea. Already, even in the trailers I'm drawn to her character and like her already. She seems like a combination of her sister, Natasha and her own unique personality.
More then Rumors she's 100% In the Hawkeye show. She's on set filming scenes right now. There are rumors she is in F&TWS. But she for sure is gonna be around for a long while. Im sure she signed a nice long term deal with Marvel. Rumors say she will be a member of the Thuderbolts. With Zemo in F&TWS. Makes sense she might cameo there. But Hawkeye is offical. They announced her in the cast and there are pics of her on set right now.
Eh, you may be right actually, given current circumstances. 750m may be closer given where we are. The world box office is in a much different place than American box office, and that may make all the difference.
This is the jumping off point for the next Marvel phase, and I just don't see it doing less than phenomenal. Everyone will want to be there for what is essentially the first episode of the next big thing.