I understand that they may want to use some Sony IPs, but I don't think Ghostbusters is a good fit for Destiny, I think other IPs have a better fit.
Or well, I think it would fit better releasing it on Haloween as a Haloween event.
I'd have chosen some sci-fi/futuristic/space IP from either movies or anime (I don't know which mega popular ones own Sony), or from PS Studios like Helldivers, Killzone, Wipeout, Concord, Jet Moto, Rollcage, etc.