I think we can see the GM role going three separate ways. I also posted my odds of this happening next to it.
50% - It is revealed that someone was the GM other then Triple H. Maybe it's Nash, maybe it's X-Pac, Foley, Austin, Michaels, Regal, who knows. But some former wrestler. This will then lead to a verbal feud with HHH, with a showdown possible at SummerSlam, or if they want to turn it into a longer feud at Survivor Series. I think it would all depend on who the person is though. X-Pac or Nash, they would do a match at SummerSlam. Foley maybe they would hold off till Survivor Series. Michaels they would hold off till Survivor Series or maybe even hold off till Mania. Regarldess if it is a big feud or a little feud, there is some form of feud over control of power on Raw.
40%- Triple H is revealed as the GM. This will just confirm that WWE wants to get away with the Anonymous Raw GM as fast as possible but they don't want to write it off like it never happen. This would be the quickest and easiest way to end the Anonymous GM storyline without just killing it cold turkey.
10% - I don't see this happening but you never know. WWE will just never talk about it again. They will act as if there was never such thing as the Anonymous Raw GM. The next time we hear about it will be in 2018 when John Cena is doing a promo reminds people of a failed angle to try to get a quick pop from the crowd.