I just found a site from May 2015 with a survey of the most popular 100 Avengers. Pretty disapointed that a lot of these are guys I don't even consider to be Avengers (a Doombot included), but also happy D-man nearly made the midway point. I wonder who didn't make the cut. Here are the top seven, with two surprises:
7 Black Panther
6 Black Widow
2 Captain Marvel
1 Captain America
I had no idea BP and CM were that popular, beating Wolverine, Spiderman, Hulk, Vision, Scarlet Witch, etc, etc. Would this be a team worth seeing? It's not likely we will, unless we can swap in the new Cap and Thor, but I think that would be a good team too.
Do you have a link to the survey? I'd be interested to learn about their polling data. Personally I think the data is skewed. Carol is popular, but there's no way she would poll above Iron Man or Thor, both of whom have had their own movie franchises.
Mind you, in May 2015 we had a female Thor and an inverted Iron Man, so who knows? The timing may also play into why Black Panther scored so high. He had some great moments in Hickman's Avengers. His feud with Namor (who I hate) was a high-point.