I have been recommended for an Article 15 but my entire chain of command is PCSing. Will I still get the Article 15 if they are all gone by the time it processes?

This response is based on the information you provided. You should seek guidance from the chain of command jag and or the IG before making a final decision. Unfortunately the article 15 can be administered by the new chain of command without an issue. However the final decision will be made by the new command team. They can choose to administer the article 15 or simply decide not to move forward with the issue. Most likely it will depend on the specifics or the situation and how serious the issue is.

The outgoing commander might even forget to brief the new commander on the issue. The current command team might just want you to sweat it out right now and let the issue die when they leave. You might want to just lay low and really do your best to be the best soldier possible until the new chain command arrives.