I'd say that Roode is still a heel, I don't think anything will change with his character but that his reaction was due more to the fact that Brooklyn is one of the smarkiest crowds of the year. They'd have cheered for him if he came out and punt kicked a three legged, one eyed puppy.
As for what might happen with Roode, it's possible he could be the next WWE Champion instead of Nakamura. As has been mentioned, Roode isn't getting any younger and the longer the wait, the less likely it is that it'll happen. However, to be fair, that's on Roode as he could've come to WWE a long time ago. I think it's very possible that Roode could wind up being the US Champion, or possibly the Intercontinental Champion if the mid-card titles and champions switch brands due to the Superstar Shakeup.
"What Do I Know Of Cultured Ways, The Gilt, The Craft And The Lie?
I, Who Was Born In A Naked Land And Bred In The Open Sky.
The Subtle Tongue, The Sophist Guile, They Fail When The Broadswords Sing.
Rush In And Die Dogs - I Was A Man Before I Was King."
Conan Of Cimmeria