I can't help but believe that a ten-year game with a persistent world with new "titles" every other year and DLC every other-other year is completely impractical. There is no way Bungie can pump out a major DLC for Destiny in one year and a full sequel in two if Treyarch can barely do the same thing with a much-simpler game like Modern Warfare. Destiny is just too big, too complex: too many persistent locations, shared missions, and common gameplay are involved to devote precious engineers to focus on engine upgrades. My theory is that these "sequels" will be expansion packs. They will all run on the Destiny 1 engine, which provides consistency of physics, art, gameplay, and online connectivity. This is significant, because that way Bungie can focus purely on content creation over the next ten years, and players who own only Destiny 1 can still raid the Dust Palace with an owner of Destiny "4" without experiencing gameplay changes or art/physics inconsistencies. It's also important to remember that Bungie's been working on the Destiny engine (and content) for three years, and they've obviously been working with both Sony and Microsoft to make Destiny available for the eighth-gen consoles (PS4/Xbox 720). So they wouldn't make an engine they would have to rework for the release of a new console. If Bungie is building a game for the next ten years, [url=http://youtu.be/T0_jiB2hqeQ?t=2m46s]why would they step backward to retool their engine (and thus rebuild everything based in that engine)[/url] every two [i]years[/i] while trying to juggle content creation for DLC [i]and[/i] maintain the ten-year persistent online world Bungie is advertising Destiny to be? I can't imagine a logical answer to that (unless I'm severely underestimating the engineers of Bungie, but it feels instinctively counterintuitive to me), so I have to go with the next best thing: "sequels" to Destiny will be large expansion packs, running on the original engine with lots of great new content. What do you think, forum-goers?