So far, I've PO'd Hawkeye, Nebula, & Iron Man, and am planning on PO'ing Black Widow and Thanos shortly. I'd also buy Captain Marvel in her Endgame short 'do, Prof. Hulk, and fat Thor, if they ever make them.
I have the first Dr. Strange, the second Black Panther, CW Falcon, CW Scarlet Witch, and mini Ant-Man to go along for the ride, and I'm waiting on an eBay coupon to come through to pick up Iron Spider. Then I BELIEVE it's just Bucky left for the main crew.
Not a big fan of WM, but I've got an older one from AoU that I'll probably throw in the display with them lol, even though it's not accurate.
My big question mark right now is Cap. Love the character, but I have the CW version, and for right now at least, there isn't enough to bring me to PO this one. Unless they reveal an awesome new headsculpt like they've been teasing. I have a couple of Thor extra's lying around to put with CW Cap in the display.
Now, if they make a movie promo version with a special base, additional accessories and a beat-up paint scheme like they have in the past, I could do that all day.