How to handle a tag change on game that had its name changed with the old one still being prominent?

Question

Next Car Game recently changed its name to "Wreckfest", as the former one only was a working title. However, to accomodate people being used to/only knowing that name, most of the time you're going to see "Next Car Game: Wreckfest" as the title, despite the actual title only being the latter one.

Question is, now, what should that tag look like?

wreckfest,next-car-game (exists), next-car-game-wreckfest are all possible, and while the third one would probably cover all the searches for it, it's not technically correct.

Answer 1

If Wreckfest is the official full name, and Next Car Game is the working title that people have already asked questions about, then the proper tag should be wreckfest. next-car-game should be a synonym of wreckfest.