Rainbow Six: Siege entered with a flashbang, but may leave with a whimper.
Evolve is an asymmetrical multiplayer game where a team of hunters chase down a monster. It was made by the hugely talented Left 4 Dead developers over six years before being released early in 2015, and I thought it was great. But publisher 2K, so convinced of the game's quality, put in place various DLC packages and pre-order bonuses to milk what it expected to be an enormous community. The perception took hold that Evolve was ripping off players—who had to buy the "core" game first—and it failed to sell in anything like the numbers expected. Now it's dead.
Rainbow Six: Siege walks a dangerously similar path.