Rockstar is too sexist. They should first plan to support playable female characters and deeep character creation like TES V SKYRIM or better. Also depending on the scenario, a continent wide free roamer would be boring if it's based on Earth, modern or old fashioned setting. and post apoc like Fallout has already been done before. It seems like no western developers care to design wonderful and interesting utopian futuristic cities with flying cars and stuff. Like Xenosaga 3 cities instead of something lame like gritty Blade Runner cities. there's too much grittiness in western videogames.
I can barely believe anyone thinks that a "continent wide" game would be good. It's like they wrongly believe that the bigger a game is, the better it automatically is.
A game world the size of a continent would be too big. Either everything would be procedurally generated and essentially the same few settings over and over again, or everything would be copied/pasted and actually the same thing over and over again. Does anyone really think it'd be fun to walk for days between villages or towns? To spend hours getting from one side of a city to the other?
In fact, "too big" is a considerable understatement. How gigantic an understatement depends on what size you assume a "continent" is. Skyrim, for example, is about 40 square kilometres in size. Europe is about 10 million square kilometres. North America is about 24m km^2. Asia (44m km^2) is about a million times bigger than Skyrim.