There are valid reasons for why Marvel swapped out Janet Van Dyne and Hank Pym for Natasha Romanova and Clint Barton as founding members of the Avengers in the MCU. Especially for where Marvel’s collective head was back in 2008-2011, when they weren’t even sure there would be an Avengers to form. It required far less CGI (and thus less money), it fit better with the MCU conceit of the Avengers being a SHIELD-sponsored paramilitary unit instead of Team Treehouse living on Tony Stark’s dime, it avoided tipping the team too far into Science Geeks Plus Cap territory, Black Widow and Hawkeye had more currency, etc. These may not be the best reasons, the only reasons, or insurmountable reasons, but they’re valid reasons.
But Marvel is going to have to come up with perfect reasons to justify apparently fridging Janet in 2014 to give Hank a tragic past and Scott Lang an age-appropriate love interest.
They had options here, far more than they did in 2008 when this was all a pipe dream or in 2011 when they punched their golden ticket with The Avengers. The MCU has expanded greatly, both on Earth with Agents of SHIELD and out into space with Guardians of the Galaxy and there is plenty of room to fit Janet in. Janet’s tiny, she fits everywhere.
Except, apparently, in the MCU as a living woman.
JK Rowling said she would have made Seamus/Dean canon but she felt it would be distracting from the main trio
Literally how much space do you need to have a line about Dean asking Seamus to the Yule ball
Look, I’ll try
"Parvati had tried to ask Dean to the ball, but he told her he was going with Seamus instead."