I definitely think so.
Marvel used a former Smallville actress, Elena Satine, to play Lorelai, and she was pretty kickass next to Lady Sif.
They've used Wonder Woman's Adrian Palicki as Mockingbird, and unless they dumb her down like they did with Maria Hill I have high hopes for this character.
Now that Arrow has killed of Caity Lotz is it too much to ask for her to be Jessica Jones? Please Disney/Marvel.
As a bonus, since they are still looking for people to play Dr. Strange, Marvel should take a look at Tom Welling. Now that he's in his late 30's he has this mature salt & pepper thing going on. Just an idea, but it can happen...
Anyway, should DC be worried? Probably not, but then again, these people are talented and underused, and the Mouse House seems to notice.