Because it was not in the article. We don't know if there are others, and cannot know if the 5 mentioned are any more strongly being looked at by Marvel/Sony or even if they are being looked at at all. allw e know is Sneider has 'sources' which say that these 5 kids were 'most talked about'. By whom? Who knows!
Honestly I trust Talion more than Sneider, Sneider has shown in his 'short-list-5' that he would rather be deceptive and let people assume what what he is saying is official, than to make a claim that he may not be correct.
Though at this point it is the same with Talion I guess... he assumes what he knows is 100% correct, except Talion actually states it as if it is 100% correct... and that you would be stupid not to believe a random guy who has 'sources' that you know nothing about.