I agree, this should be it. But it's premature for anyone to think the last two on your list are a lock. But maybe they are???
Not only are they the next 2 on the BCA points list, they're both playing great, both have Cup experience and both bring name recognition that will surely please Matchroom's sponsors.
If not Shane and Corey, who might be a feasible choice to get invited? The next Americans on the points list are Charlie Williams, then Mike DeChaine, and then John Schmidt. John has the most star power of these 3 IMO, but he's sitting on about half the points that Shane and Corey are on. As much as I enjoy John's play, that wouldn't seem quite fair. (Actually, Charlie may have more star power. I'm not sure how the Asian market responds to him.)
It's got to be Corey and Shane, right?