Originally Posted by DrCosmic
The former leads to the latter, or a similar conflict in Avengers 2.
I think that you are over emphasising the importance of having wildly different skill sets. You can incorporate characters with similar skills into a film quite easily I think. I also get the impression that Sharon is really closer to a SHIELD grunt than she is Natasha. I'm not widely read when it comes to Sharon though. In terms of Avengers 2, it shouldn't be an issue because Sharon won't actually be on the team.