That is pretty optimistic. The corporation is likely cash strapped after the merger and are relentlessly downsizing and streamlining their parks to reduce cash outflows in order to more quickly recover from the merger expenses. It is doubtful they will have the resources to perform major park rebuilds as their main focus would be paying off the expenses steming from the merger and cutting whatever they deem as overlaps. A big problem with mergers is that they create overlaps that cause market capitalization. This is why with companies that merged together often engage in downsizing to eliminate overlaps to reduce market cannibalization and unneeded outflowsYeah, the doomerism around SFGAdv all the sudden is totally unwarranted. The way they are handling this year's attraction bloodbath is clearly unacceptable and the chain should be called on it relentlessly.
That said, I would bet money that, 5 years down the line, it will be crystal clear that Six Flags Great Adventure is one of the new Six Flags' flagship properties on track to the same level of notoriety/quality/reputation/etc as Kings Island or Carowinds at an absolute minimum.
Baring some insane turn of events, Great Adventure's future is, in my assessment, obviously very, very bright.
Another issue with the merger is that it has shaken up the pecking order of the parks in each formerly separate chain. We may see a pretty weird new reorder of the park hierarchy as they are recombined into whatever the new pecking order will be. One thing that is likely is that the CF executives still want CP to be the flagship park of the newly combined chain and probably don't want any of the SF parks to share that position with CP.