How long should you wait for a promotion?

In my last performance review, we discussed me being promoted to an engineering manager role because I'm already doing a considerable amount of what an engineering manager does. However, we had something big happen (good thing for the company but can't disclose yet) so we had to put this promotion on pause until everything settles down. It has been a couple of months since the undisclosable event and I haven't been able to get far in discussion with my supervisor about the promotion and setting a timeline. I could go elsewhere but I do like the company. Is it still too early?