According to the press release (
posted here), there was no mention of accessing the ride from CityWalk. I think it was indeed planned and people heard about it, but the plans just never came to fruition with all the problems and delays and closures Rockit had. The gate between the ride and the BMG theater is an obvious sign that it was planned, because otherwise there's no need for that entrance, in my opinion. I think the after-hours Rockit plans are probably shelved and they're focusing more on the new attractions and new entertainment within the park.