A 10 year investment spread over (at least) 3 games. Seems pretty manageable. Destiny doesn't seem to be the type of game to punch out a title every year (ala CoD). And Bungie has been given the money by the publisher to develop for these 10 years. This is irregardless of how well they sell (and let's face it, Destiny 1 has sold phenomenally well). Now it's up to Bungie whether or not they keep what is good, and change what is not. The fact that certain problems exist in Destiny 1 is not reason to believe Destiny 2 will be a flop. Bungie has proven to us that they notice issues in their formula; they know what isn't working (hence why Crota's End has much more forgiving drops than VoG). Let's not judge how well the franchise is going to turn out when we've only just tasted the appetiser.